{"title":"IAME KA100 Tillotson HW-33A Carb","description":"","products":[{"product_id":"tillotson-hw-33a-carburetor-ka100","title":"(76A) Tillotson HW-33A Carburetor – IAME KA100 \/ X30","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A carburetor\u003c\/strong\u003e is the factory-specified carburetor for the IAME KA100 100cc reed-jet engine. This is the complete, ready-to-install carburetor assembly, manufactured by Tillotson and supplied by IAME. The HW-33A is a diaphragm-style carburetor designed for the high-RPM, position-independent operation required by two-stroke kart racing.\u003c\/p\u003e\n\u003cp\u003eThe Tillotson HW-33A is also used on the IAME X30 engine platform, making this carburetor cross-compatible across both major IAME TaG classes. It features adjustable high-speed and idle mixture screws, a diaphragm fuel pump, and a linkage for throttle cable connection. The HW-33A requires periodic rebuilding with diaphragm kits (TI-DG-3HW) or complete repair kits (TI-RK-6HW) as part of regular maintenance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Diaphragm carburetor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100, X30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Adjustable high-speed and idle mixture, diaphragm fuel pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 complete carburetor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRebuild kits and all internal service parts (diaphragms, gaskets, jets, needles) are available separately. If you are new to diaphragm carb tuning, consult your engine builder or a detailed tuning guide before adjusting mixture screws. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47820104040669,"sku":"TI-HW-33A","price":318.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100TillotsonHW33A.png?v=1776476707"},{"product_id":"iame-ka100-carb-diaphragm-rebuild-kit","title":"(430A) IAME KA100 Carburetor Diaphragm Rebuild Kit","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 carburetor diaphragm rebuild kit\u003c\/strong\u003e is a gasket and diaphragm replacement set for the Tillotson HW-33A carburetor used on the KA100 engine. This kit includes the metering diaphragm, fuel pump diaphragm, and associated gaskets — the primary wear items inside the carb that deteriorate from fuel exposure and heat cycling over time.\u003c\/p\u003e\n\u003cp\u003eThis is the basic carb refresh kit for racers who want to replace the soft goods without changing the needle, seat, or fulcrum arm. Diaphragms lose their flexibility over time, causing inconsistent fuel delivery, lean or rich running conditions, and poor throttle response. Most engine builders recommend replacing diaphragms at the start of every season or every 10-15 race weekends.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Tillotson — Part Number: RK3HW\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Metering diaphragm, fuel pump diaphragm, gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes NOT Include:\u003c\/strong\u003e Needle, seat, or fulcrum arm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe most common carb maintenance item. Fresh diaphragms restore crisp throttle response and consistent fuel metering. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220650205,"sku":"RK3HW","price":16.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_430a_Exhaust_Group_2.png?v=1776812393"},{"product_id":"iame-ka100-carb-rebuild-kit-full","title":"(430A) IAME KA100 Carburetor Rebuild Kit – with Needle, Seat \u0026 Fulcrum","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 carburetor rebuild kit\u003c\/strong\u003e is the complete repair kit for the Tillotson HW-27A and HW-33A carburetors used on the KA100 and X30 engines. This comprehensive kit includes everything in the basic diaphragm kit (metering diaphragm, fuel pump diaphragm, gaskets) plus the inlet needle, seat, and fulcrum arm — the critical fuel metering components that control fuel flow into the carburetor.\u003c\/p\u003e\n\u003cp\u003eThis is the full rebuild option for carburetors that need more than just a diaphragm refresh. The needle and seat control fuel inlet flow and are the most critical precision components inside the carb. A worn needle or seat causes flooding, inconsistent fuel levels, and unpredictable mixture — symptoms that diaphragm replacement alone will not fix.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Tillotson — Part Number: TI-RK-6HW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Tillotson HW-27A, HW-33A carburetor (IAME KA100, X30)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Diaphragms, gaskets, inlet needle, seat, fulcrum arm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 complete rebuild kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe complete carb rebuild solution. If your carb is flooding, running inconsistently, or has high hours, this is the kit you need. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220682973,"sku":"TI-RK-6HW","price":36.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100430aExhaustGroup_1.png?v=1776812329"},{"product_id":"tillotson-hw33a-metering-diaphragm","title":"(10) Tillotson HW-33A Metering Diaphragm","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A metering diaphragm\u003c\/strong\u003e is the fuel metering diaphragm located in the bottom cover of the Tillotson HW-33A carburetor used on the IAME KA100 and X30 engines. This diaphragm flexes in response to fuel demand, actuating the inlet needle to regulate fuel flow into the metering chamber. It is the primary control element that determines how much fuel the carburetor delivers at any given throttle position and engine load. \u003c\/p\u003e\n\u003cp\u003eMetering diaphragms lose their flexibility over time from fuel exposure, heat cycling, and age. A stiff or degraded diaphragm causes inconsistent fuel delivery — typically manifesting as a lean condition under load, poor throttle response, or inability to maintain consistent mixture across a race distance. Most engine builders recommend replacing the metering diaphragm at the start of every season or every 10-15 race weekends.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 diaphragm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFresh diaphragms restore crisp fuel metering. One of the most impactful carb maintenance items you can replace. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883284775133,"sku":"TI-237-600X","price":5.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10010TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-diaphragm-cover","title":"(11) Tillotson HW-33A Diaphragm Cover","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A diaphragm cover\u003c\/strong\u003e is the bottom cover plate that encloses and protects the metering diaphragm on the HW-33A carburetor. This cover provides the sealed chamber that allows the diaphragm to function properly by maintaining the pressure differential needed for fuel metering. The cover also protects the diaphragm from physical damage and contamination.\u003c\/p\u003e\n\u003cp\u003eInspect the diaphragm cover during every carb service for warping, scratches on the sealing surface, or cracks. A warped or damaged cover prevents the diaphragm from sealing properly, causing fuel metering inconsistency. The cover sealing surface must be flat and clean for proper function.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplace if the sealing surface is scratched or warped. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883284807901,"sku":"TI-91A-275","price":7.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10010TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-pump-gasket","title":"(13) Tillotson HW-33A Fuel Pump Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel pump gasket\u003c\/strong\u003e seals the junction between the fuel pump body and the carburetor main body. This gasket ensures proper pulse channel sealing for the crankcase-driven fuel pump to function correctly. A leaking pump gasket reduces fuel pump efficiency, causing fuel starvation under high demand conditions.\u003c\/p\u003e\n\u003cp\u003eReplace this gasket whenever the fuel pump section is disassembled for diaphragm replacement or carb service. Old gaskets compress and lose their sealing ability. Always install the gasket with correct orientation — the pulse holes must align with the carburetor body channels.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways replace during carb service. Included in diaphragm and rebuild kits, but available individually. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883284840669,"sku":"TI-16-B407X","price":39.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10013TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-pump-body","title":"(15) Tillotson HW-33A Fuel Pump Body","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel pump body\u003c\/strong\u003e is the housing that contains the fuel pump diaphragm and creates the pumping chamber on the HW-33A carburetor. The fuel pump on a Tillotson diaphragm carb is driven by crankcase pressure pulses, and the pump body provides the sealed chamber where the diaphragm flexes to draw fuel from the tank and push it into the carburetor metering system.\u003c\/p\u003e\n\u003cp\u003eReplace the pump body if the internal surfaces are scored, if the mating surfaces are warped, or if pulse channel passages are blocked or damaged. A compromised pump body reduces fuel delivery capability, causing lean running under high demand.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 pump body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRarely needs replacement unless physically damaged. Inspect during full carb rebuilds. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883284906205,"sku":"TI-141-89T","price":10.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_15_TILLOTTSON_CARBURETOR_HW33A.png?v=1778170378"},{"product_id":"tillotson-hw33a-fuel-pump-body-screw","title":"(16) Tillotson HW-33A Fuel Pump Body Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel pump body screw\u003c\/strong\u003e is the fastener that secures the fuel pump cover assembly to the carburetor body. This screw clamps the fuel pump diaphragm, gasket, and pump body together, and must be properly tightened to maintain the sealed pump chamber.\u003c\/p\u003e\n\u003cp\u003eOver-tightening this screw can warp the pump body or strip the threads in the carb body. Under-tightening allows air leaks into the pump chamber, reducing fuel delivery. Use care when tightening — snug is sufficient. Replace if threads are stripped or the head is damaged.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHandle with care to avoid stripping. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285070045,"sku":"TI-15C-51X","price":10.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10016TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-strainer-screen","title":"(17) Tillotson HW-33A Fuel Strainer Screen","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel strainer screen\u003c\/strong\u003e is the inline filter screen located inside the fuel pump section of the carburetor. This screen catches debris and contaminants before they reach the metering chamber and needle valve, protecting the precision internal components from blockage or damage.\u003c\/p\u003e\n\u003cp\u003eA clogged strainer screen restricts fuel flow to the carb, causing fuel starvation, lean running, and loss of power — especially at high RPM when fuel demand is greatest. Inspect and clean the screen during every carb service. Replace if the mesh is torn, deformed, or permanently clogged.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screen\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eClean this screen every time you service the carb. A blocked screen causes hard-to-diagnose lean conditions. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285102813,"sku":"TI-95-170X","price":10.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10017TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-strainer-cover-gasket","title":"(18) Tillotson HW-33A Fuel Strainer Cover Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel strainer cover gasket\u003c\/strong\u003e seals the fuel strainer cover to the fuel pump body on the HW-33A carburetor. This gasket prevents air from entering the fuel circuit at the strainer cover, which would cause the fuel pump to lose prime and deliver inconsistent fuel.\u003c\/p\u003e\n\u003cp\u003eReplace this gasket every time the fuel strainer cover is removed for screen cleaning or inspection. Reused gaskets rarely seal properly and are a common source of hidden air leaks in the fuel system.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways replace when servicing the fuel strainer. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285397725,"sku":"TI-16-B205X","price":7.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10018TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-strainer-cover","title":"(19) Tillotson HW-33A Fuel Strainer Cover","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel strainer cover\u003c\/strong\u003e is the access cap that covers the fuel strainer screen on the HW-33A carburetor. This cover is removed to access the fuel strainer for cleaning and inspection. It seals against the pump body via the strainer cover gasket (TI-16-B205X).\u003c\/p\u003e\n\u003cp\u003eReplace the cover if it shows cracks, a warped sealing surface, or damaged threads for the retaining screw. A compromised cover allows air into the fuel system, disrupting fuel pump operation.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInspect the sealing surface whenever you service the strainer. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285430493,"sku":"TI-91-A251","price":3.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10019TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fuel-strainer-cover-screw","title":"(20) Tillotson HW-33A Fuel Strainer Cover Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fuel strainer cover retaining screw\u003c\/strong\u003e secures the fuel strainer cover to the fuel pump body. This screw must be snug but not over-torqued to maintain a proper seal without damaging the cover or stripping the threads.\u003c\/p\u003e\n\u003cp\u003eThis small screw is easily lost during carb service. Keep spares on hand. Replace if threads are damaged or the head is stripped.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEasy to lose during carb service. Grab extras. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285496029,"sku":"TI-15-B313X","price":7.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10020TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-idle-mixture-screw","title":"(21A) Tillotson HW-33A Idle Mixture Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A idle mixture screw\u003c\/strong\u003e controls the fuel\/air mixture at idle and low-speed operation on the HW-33A carburetor. Turning the screw clockwise leans the idle mixture; counterclockwise richens it. Proper idle mixture setting ensures smooth idle, clean off-idle transition, and consistent low-speed behavior.\u003c\/p\u003e\n\u003cp\u003eThe idle mixture screw tip (needle point) can become worn, bent, or damaged from repeated adjustment or over-tightening into its seat. A damaged needle tip prevents precise mixture control. Replace the screw if the tip shows any wear or deformation.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNever bottom out a mixture screw forcefully — it damages the needle tip and the seat in the carb body. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285528797,"sku":"TI-43-1029","price":11.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10021ATILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-idle-mixture-screw-spring","title":"(21B) Tillotson HW-33A Idle Mixture Screw Spring","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A idle mixture screw spring\u003c\/strong\u003e provides tension on the idle mixture screw, preventing it from vibrating out of its set position during engine operation. Without proper spring tension, the mixture screw can self-adjust from vibration, causing the idle mixture to drift throughout a race session.\u003c\/p\u003e\n\u003cp\u003eReplace the spring during any carb rebuild or whenever you notice the idle mixture screw turning too easily without spring resistance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplace during carb rebuilds to ensure consistent mixture settings. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285561565,"sku":"TI-24-B449X","price":6.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10021TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-idle-mixture-screw-washer","title":"(21C) Tillotson HW-33A Idle Mixture Screw Washer","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A idle mixture screw washer\u003c\/strong\u003e is the sealing washer that sits behind the idle mixture screw in the carburetor body. This washer prevents air from leaking past the mixture screw threads into the idle circuit, which would cause an uncontrolled lean condition at idle.\u003c\/p\u003e\n\u003cp\u003eReplace during any carb rebuild. A worn or missing washer is a common cause of erratic idle behavior that cannot be corrected with mixture screw adjustment alone.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 washer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA hidden cause of idle problems. Always replace during carb service. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285594333,"sku":"TI-78A-256X","price":8.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_21C_TILLOTTSON_CARBURETOR_HW33A.png?v=1778167390"},{"product_id":"tillotson-hw33a-idle-mixture-screw-packing","title":"(21D) Tillotson HW-33A Idle Mixture Screw Packing","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A idle mixture screw packing\u003c\/strong\u003e is the O-ring or packing seal behind the idle mixture screw that provides the primary seal against air leaks in the idle circuit. This packing works with the washer (TI-78A-256X) and spring (TI-24-B449X) as part of the complete idle mixture screw assembly.\u003c\/p\u003e\n\u003cp\u003eReplace the packing during every carb rebuild. A worn packing allows unmetered air into the idle circuit, making accurate idle mixture tuning impossible.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 packing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEssential for a proper seal on the mixture screw. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285692637,"sku":"TI-44-361X","price":11.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_21D_TILLOTTSON_CARBURETOR_HW33A.png?v=1778167384"},{"product_id":"tillotson-hw33a-inlet-control-lever","title":"(25) Tillotson HW-33A Inlet Control Lever","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A inlet control lever\u003c\/strong\u003e is the fulcrum arm that actuates the inlet needle in response to metering diaphragm movement. As fuel is consumed, the diaphragm pushes on this lever, which lifts the inlet needle off its seat to allow more fuel into the metering chamber. The lever's height setting determines the fuel level in the carburetor and directly affects mixture across the entire RPM range.\u003c\/p\u003e\n\u003cp\u003eLever height must be set precisely per the Tillotson specification. An incorrect lever height causes the carburetor to run consistently rich or lean regardless of mixture screw settings. Replace the lever if it is bent, worn at the pivot point, or damaged at the needle contact pad.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 lever\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSet lever height to spec with a straightedge after installation. This is the most critical setting in the carburetor. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285725405,"sku":"TI-155-A27X","price":10.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_25_TILLOTTSON_CARBURETOR_HW33A.png?v=1778167163"},{"product_id":"tillotson-hw33a-fulcrum-lever-screw","title":"(26) Tillotson HW-33A Fulcrum Lever Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fulcrum lever screw\u003c\/strong\u003e is the pivot screw that secures the inlet control lever to the carburetor body. The lever pivots on this screw, and its tightness affects how freely the lever moves. Too tight and the lever binds; too loose and the lever has excessive play, both affecting fuel metering accuracy.\u003c\/p\u003e\n\u003cp\u003eReplace if the screw threads are damaged or the head is stripped. Always verify lever movement is smooth and free after tightening.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEnsure the lever pivots freely after tightening. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285758173,"sku":"TI-15-B329X","price":7.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10026TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-fulcrum-lever-pin","title":"(26A) Tillotson HW-33A Fulcrum Lever Pin","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A fulcrum lever pin\u003c\/strong\u003e is the pivot pin that the inlet control lever rotates on inside the carburetor body. This pin provides the fulcrum point for the lever mechanism and must be in good condition for smooth, precise lever movement.\u003c\/p\u003e\n\u003cp\u003eA worn pin creates excessive lever play, which causes inconsistent fuel metering. Replace during full carb rebuilds if any wear is detected.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 pin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSmall but precision-critical. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285790941,"sku":"TI-32-79X","price":6.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10026ATILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-inlet-needle-seat-set","title":"(27) Tillotson HW-33A Inlet Needle \u0026 Seat Set","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A inlet needle and seat set\u003c\/strong\u003e is the precision valve assembly that controls fuel flow into the carburetor metering chamber. The needle sits in the seat and is lifted by the inlet control lever to allow fuel in when demanded. When the metering chamber is full, the needle re-seats to shut off fuel flow. This on\/off cycling happens continuously at high frequency during engine operation.\u003c\/p\u003e\n\u003cp\u003eThe needle tip and seat bore are precision-matched surfaces. Wear, debris damage, or corrosion at the needle-seat interface causes flooding, inconsistent fuel levels, or inability to maintain mixture. This is one of the most critical replacement items during a carb rebuild. Always replace the needle and seat as a matched set — never mix old and new components.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Matched inlet needle and seat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your carb is flooding or fuel levels are inconsistent, the needle and seat are the first place to look. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285823709,"sku":"TI-233-721P","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10027TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-inlet-seat-gasket","title":"(28) Tillotson HW-33A Inlet Seat Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A inlet seat gasket\u003c\/strong\u003e seals the inlet needle seat into the carburetor body. This gasket prevents fuel from leaking around the outside of the seat, which would bypass the metering system and cause uncontrolled fuel flow into the carburetor.\u003c\/p\u003e\n\u003cp\u003eAlways replace this gasket when replacing the inlet needle and seat set. A leaking seat gasket causes symptoms identical to a worn needle\/seat — flooding and rich running.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways replace alongside the needle and seat. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285856477,"sku":"TI-16-B199X","price":5.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA10028TILLOTTSONCARBURETORHW33A.png?v=1778166806"},{"product_id":"tillotson-hw33a-inlet-tension-spring","title":"(29) Tillotson HW-33A Inlet Tension Spring – Select Weight","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A inlet tension spring\u003c\/strong\u003e controls the closing force of the inlet needle in the carburetor metering system. The spring tension determines how aggressively the needle re-seats when fuel demand decreases, which directly affects fuel metering response and consistency. Available in five weight options — 26G, 31G, 37G, 42G, and 46G — allowing engine builders to fine-tune fuel delivery characteristics to match specific engine setups and track conditions.\u003c\/p\u003e\n\u003cp\u003eLighter springs (26G, 31G) allow the needle to open more easily, providing richer fuel delivery under moderate demand. Heavier springs (42G, 46G) require more diaphragm force to open the needle, resulting in leaner metering at partial throttle. The 37G spring is typically the baseline starting point for most KA100 setups. Consult your engine builder for the recommended spring weight for your specific configuration.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Weights:\u003c\/strong\u003e 26G, 31G, 37G, 42G, 46G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Controls inlet needle closing force \/ fuel metering response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring per order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSpring selection is an advanced tuning variable. Most racers start with 37G and adjust from there based on engine builder recommendations. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"26G","offer_id":47891660374237,"sku":"TI-24-B323X","price":13.85,"currency_code":"USD","in_stock":true},{"title":"31G","offer_id":47891660407005,"sku":"TI-24-C296X","price":13.85,"currency_code":"USD","in_stock":true},{"title":"37G","offer_id":47883285954781,"sku":"TI-24-B299X","price":13.85,"currency_code":"USD","in_stock":true},{"title":"42G","offer_id":47891660439773,"sku":"TI-24-C298X","price":13.85,"currency_code":"USD","in_stock":true},{"title":"46G","offer_id":47891660472541,"sku":"TI-24-C297X","price":13.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_29_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163609"},{"product_id":"tillotson-hw33a-high-speed-mixture-screw","title":"(30A) Tillotson HW-33A High Speed Mixture Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A high speed mixture screw\u003c\/strong\u003e controls the fuel\/air mixture at wide-open throttle and high RPM on the HW-33A carburetor. This is the primary tuning screw that determines peak power output mixture — turning clockwise leans the high-speed circuit, counterclockwise richens it. Correct high-speed mixture is critical for both performance and engine safety.\u003c\/p\u003e\n\u003cp\u003eA lean high-speed setting produces more power but risks detonation and piston damage. A rich setting protects the engine but costs power. The optimal setting produces a light chocolate-brown to tan spark plug reading. Replace the screw if the needle tip is worn, bent, or damaged.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNever bottom out mixture screws forcefully. A damaged tip prevents precise mixture control. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883285987549,"sku":"TI-43-1030","price":11.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_30_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-high-speed-mixture-screw-spring","title":"(30B) Tillotson HW-33A High Speed Mixture Screw Spring","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A high speed mixture screw spring\u003c\/strong\u003e provides tension on the high-speed mixture screw, preventing it from vibrating out of position during engine operation. Without proper spring tension, the mixture setting drifts during a race, causing inconsistent power delivery.\u003c\/p\u003e\n\u003cp\u003eReplace the spring during any carb rebuild or when the mixture screw turns too freely without resistance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEnsures your high-speed mixture stays where you set it. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883287920861,"sku":"TI-24B-449X","price":6.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_30A_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163609"},{"product_id":"tillotson-hw33a-high-speed-mixture-screw-washer","title":"(30C) Tillotson HW-33A High Speed Mixture Screw Washer","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A high speed mixture screw washer\u003c\/strong\u003e is the sealing washer behind the high-speed mixture screw in the carburetor body. It prevents air leaks past the screw threads that would introduce unmetered air into the high-speed fuel circuit, causing a lean condition under load.\u003c\/p\u003e\n\u003cp\u003eReplace during carb rebuilds. A worn washer is a hidden cause of unexplained lean running at wide-open throttle.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 washer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways replace during carb service. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883287986397,"sku":"TI-78-A256X","price":8.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_30C_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-high-speed-mixture-screw-packing","title":"(30D) Tillotson HW-33A High Speed Mixture Screw Packing","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A high speed mixture screw packing\u003c\/strong\u003e is the O-ring or packing seal behind the high-speed mixture screw. This is the same part as the idle mixture screw packing (TI-44-361X) — both mixture screws use identical packing. It provides the primary seal preventing air leaks into the high-speed fuel circuit.\u003c\/p\u003e\n\u003cp\u003eReplace during every carb rebuild. Order two — one for each mixture screw.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 packing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSame part for both mixture screws. Order two per carb rebuild. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288019165,"sku":"TI-44-361X-HS","price":11.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_30D_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-shaft-clip","title":"(33) Tillotson HW-33A Throttle Shaft Clip","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shaft clip\u003c\/strong\u003e retains the throttle shaft in the carburetor body, preventing lateral movement while allowing the shaft to rotate freely for throttle opening and closing. A missing or damaged clip allows the shaft to walk sideways, causing binding or erratic throttle response.\u003c\/p\u003e\n\u003cp\u003eInspect during any throttle-related service. Replace if deformed or missing.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 clip\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA tiny part that keeps the throttle functioning properly. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288051933,"sku":"TI-29-224X","price":10.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_33_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-shaft-clip-screw","title":"(35) Tillotson HW-33A Throttle Shaft Clip Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shaft clip retaining screw\u003c\/strong\u003e secures the throttle shaft clip to the carburetor body. This small screw ensures the clip stays in position and the throttle shaft remains properly located. Replace if threads are stripped or the head is damaged.\u003c\/p\u003e\n\u003cp\u003eUse care when tightening — these small screws strip easily if over-torqued.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHandle carefully. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288084701,"sku":"TI-15-C19X","price":9.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_35_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163609"},{"product_id":"tillotson-hw33a-throttle-return-spring","title":"(36) Tillotson HW-33A Throttle Return Spring","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle return spring\u003c\/strong\u003e is the internal spring within the carburetor that returns the throttle shutter to the closed (idle) position when throttle input is released. This is a safety-critical component — the throttle must return to idle reliably every time the pedal is released.\u003c\/p\u003e\n\u003cp\u003eReplace if the spring shows signs of fatigue, stretching, or corrosion. A weak return spring causes hanging throttle or slow return to idle, which is both a performance and safety concern.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA safety-critical part. Replace at any sign of weakness. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288117469,"sku":"TI-24-B381X","price":10.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_36_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-shutter","title":"(37) Tillotson HW-33A Throttle Shutter (Butterfly)","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shutter\u003c\/strong\u003e is the butterfly valve disc that controls airflow through the carburetor bore. The shutter rotates on the throttle shaft — fully closed at idle, fully open at wide-open throttle. The shutter's edge seal and fit determine idle quality and off-idle transition responsiveness.\u003c\/p\u003e\n\u003cp\u003eReplace if the shutter shows wear marks on the edges, is bent, or no longer seats squarely in the bore. A worn shutter allows air to bypass at idle, causing high idle and lean off-idle conditions.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 shutter disc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn throttle shutter causes tuning headaches. Inspect during rebuilds. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288150237,"sku":"TI-14-A118","price":21.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_37_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-shutter-screw","title":"(38) Tillotson HW-33A Throttle Shutter Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shutter screw\u003c\/strong\u003e secures the throttle shutter (butterfly) disc to the throttle shaft. This screw must be tight and secure — if it loosens, the shutter can shift on the shaft, causing erratic throttle behavior or the shutter could detach entirely and be ingested into the engine.\u003c\/p\u003e\n\u003cp\u003eReplace if the screw is loose, threads are damaged, or during any throttle shutter service.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA loose shutter screw is a safety hazard. Check during every carb service. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288183005,"sku":"TI-15-C20X","price":9.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_38_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-shaft","title":"(42) Tillotson HW-33A Throttle Shaft","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shaft\u003c\/strong\u003e is the rotating shaft that carries the throttle shutter (butterfly) and connects to the external throttle lever assembly. The shaft rotates in the carburetor body bore and must fit snugly to prevent air leaks while still turning freely. A worn shaft allows air to bypass the throttle shutter at idle, causing high idle and lean conditions.\u003c\/p\u003e\n\u003cp\u003eReplace if the shaft shows play in the carburetor body bore, scoring, or wear marks. Shaft wear is accelerated by debris in the air stream.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn shaft is a sign of a high-hour carburetor. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288281309,"sku":"TI-13-B216","price":17.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_42_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-lever-assembly","title":"(43) Tillotson HW-33A Throttle Lever Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle lever assembly\u003c\/strong\u003e is the external lever that attaches to the throttle shaft and connects to the throttle cable from the pedal. This lever converts the linear cable pull into rotational shaft movement to open and close the throttle. Proper lever geometry and free movement are essential for smooth, predictable throttle response.\u003c\/p\u003e\n\u003cp\u003eReplace if the lever is bent, cracked, or if the cable attachment point is worn causing cable slop.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 lever assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEnsure smooth, slop-free throttle operation. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288379613,"sku":"TI-12-1220","price":18.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_43_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610"},{"product_id":"tillotson-hw33a-throttle-lever-retaining-screw","title":"(44) Tillotson HW-33A Throttle Lever Retaining Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle lever retaining screw\u003c\/strong\u003e secures the throttle lever assembly to the throttle shaft. This screw must be tight to prevent the lever from slipping on the shaft, which would cause loss of throttle control.\u003c\/p\u003e\n\u003cp\u003eCheck tightness regularly. Replace if threads are stripped.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA critical safety fastener. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288445149,"sku":"TI-15-C52X","price":13.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_44_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-idle-nozzle","title":"(51) Tillotson HW-33A Idle Nozzle","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A idle nozzle\u003c\/strong\u003e is a fixed jet that meters fuel delivery to the idle and low-speed circuit of the carburetor. This nozzle works in conjunction with the idle mixture screw to control fuel flow at idle and during the off-idle transition. The nozzle is a precision-calibrated component that should not be modified.\u003c\/p\u003e\n\u003cp\u003eReplace if the nozzle bore is worn, corroded, or blocked by debris that cannot be cleaned. A damaged idle nozzle causes poor idle quality and hesitation during off-idle acceleration.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 nozzle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA precision metering component. Do not modify the bore. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288543453,"sku":"TI-363-318","price":20.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_51_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-main-plug","title":"(54) Tillotson HW-33A Main Plug (Welch Plug)","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A main plug\u003c\/strong\u003e is a welch plug (expansion plug) that seals an internal fuel passage in the carburetor body. This plug is pressed into the carb body during manufacturing and covers the main fuel circuit drilling. It should only be removed during a complete carburetor overhaul and must be replaced with a new plug if removed.\u003c\/p\u003e\n\u003cp\u003eA leaking main plug causes internal fuel bypass, making accurate mixture tuning impossible. Replace if the plug is loose, corroded, or was removed during service.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOnly needed during full carburetor overhaul. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288608989,"sku":"TI-80-160X","price":19.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_54_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085731"},{"product_id":"tillotson-hw33a-cable-bracket","title":"(55) Tillotson HW-33A Cable Bracket","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A cable bracket\u003c\/strong\u003e is the throttle cable attachment bracket that mounts to the carburetor body. This bracket provides the anchor point for the throttle cable outer housing, allowing the inner cable to pull on the throttle lever. Proper bracket positioning ensures smooth cable routing and consistent throttle feel.\u003c\/p\u003e\n\u003cp\u003eReplace if the bracket is bent, cracked, or if the cable retention point is worn, causing cable slop.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 bracket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProper cable routing starts here. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288707293,"sku":"TI-136-562","price":22.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_55_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-cable-bracket-screw","title":"(56) Tillotson HW-33A Cable Bracket Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A cable bracket retaining screw\u003c\/strong\u003e secures the throttle cable bracket to the carburetor body. This screw keeps the cable anchor point stable, ensuring consistent throttle cable geometry and smooth operation.\u003c\/p\u003e\n\u003cp\u003eReplace if threads are damaged or the head is stripped.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep a spare. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288772829,"sku":"TI-15-C67X","price":9.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_56_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-limiter-screw","title":"(57) Tillotson HW-33A Limiter Screw","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A limiter screw\u003c\/strong\u003e is the throttle stop screw that sets the minimum throttle opening (idle position) on the carburetor. This screw contacts the throttle lever and prevents the shutter from closing completely, maintaining the minimum airflow needed for idle operation.\u003c\/p\u003e\n\u003cp\u003eAdjust the limiter screw to set idle speed per the IAME service manual. Replace if the screw tip is worn or the threads are damaged.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSets idle speed. Replace if the tip is rounded or worn. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288871133,"sku":"TI-15-C9X","price":24.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_57_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-limiter-spring","title":"(58) Tillotson HW-33A Limiter Spring","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A limiter spring\u003c\/strong\u003e provides tension on the limiter (throttle stop) screw, preventing it from vibrating out of position. Without proper spring tension, the idle speed can drift during a race session as the screw works loose from engine vibration.\u003c\/p\u003e\n\u003cp\u003eReplace if the spring has lost tension or shows signs of fatigue.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeeps your idle speed setting consistent. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288969437,"sku":"TI-24-B131X","price":7.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_58_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"tillotson-hw33a-carb-mounting-nut","title":"(60) Tillotson HW-33A Carburetor Mounting Nut","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A carburetor mounting nut\u003c\/strong\u003e is the fastener used to secure the carburetor to the intake manifold stud bolts. This nut is specific to the Tillotson carburetor mounting pattern and must clamp the carb evenly against the manifold gasket for a proper seal.\u003c\/p\u003e\n\u003cp\u003eReplace if threads are worn or the nut does not torque smoothly. Two nuts are required per carburetor installation.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 nut\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep spares in your carb service kit. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883289034973,"sku":"TI-81-377","price":3.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_60_TILLOTTSON_CARBURETOR_HW33A.png?v=1778085373"},{"product_id":"iame-ka100-inline-throttle-cable-return-spring","title":"IAME KA100 Inline Throttle Cable Return Spring","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 inline throttle cable return spring\u003c\/strong\u003e is an auxiliary return spring installed on the throttle cable itself, providing a secondary throttle return force independent of the carburetor's internal return spring. This inline spring adds redundancy to the throttle return system — if the internal carb spring fails, this secondary spring still closes the throttle.\u003c\/p\u003e\n\u003cp\u003eSome sanctioning bodies require a secondary throttle return mechanism as a safety regulation. The inline cable return spring satisfies this requirement. It mounts along the throttle cable between the pedal and the carburetor. Replace if the spring shows fatigue, stretching, or loss of tension.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA safety item providing redundant throttle return. Required by some series. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883289100509,"sku":"24C-334X","price":46.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100ReturnSpringTILLOTTSONCARBURETORHW33A.png?v=1778015616"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/collections\/CMC_KA100_TILLOTSON_HW-33A_CARB.png?v=1776179671","url":"https:\/\/cmckarting.com\/collections\/iame-ka100-tillotson-hw-33a-carb.oembed?page=3","provider":"CMC Karting","version":"1.0","type":"link"}