{"title":"IAME KA100 Exhaust Group and Gaskets","description":"","products":[{"product_id":"iame-ka100-exhaust-nut-tech-wire","title":"(400) IAME KA100 Exhaust Nut – Drilled for Tech Wire","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust nut (drilled for tech wire)\u003c\/strong\u003e is the factory OEM fastener used to secure the exhaust header to the cylinder on the KA100 engine. This long exhaust nut features a through-hole for threading safety wire (tech wire), which is required by most sanctioning bodies including SKUSA and USPKS to prevent the exhaust from loosening during competition. \u003c\/p\u003e\n\u003cp\u003eThe exhaust studs on the KA100 cylinder accept two exhaust nuts, one on each side of the header flange. These nuts are torqued to spec and then safety-wired together through the drilled holes. Exhaust nuts should be inspected at every race event for thread damage, loosening, or corrosion from exhaust heat. Replace any nut that does not torque smoothly or shows signs of heat-related weakening.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 nut (order 2 per exhaust header)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTech wire on the exhaust nuts is mandatory in most sanctioned KA100 classes. Always carry spares — exhaust hardware takes a beating from heat and vibration. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220289757,"sku":"IAA-20300","price":9.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_400_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-m8-washer-exhaust","title":"(401) IAME KA100 M8 Washer – Exhaust","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 M8 washer\u003c\/strong\u003e is a flat washer used under the exhaust nuts on the KA100 engine. This 8mm washer provides proper load distribution between the exhaust nut and the header flange, protecting the header surface from damage during torquing and preventing the nut from digging into the flange material.\u003c\/p\u003e\n\u003cp\u003eExhaust washers endure extreme heat cycling from the exhaust gases passing through the header. Over time, they can become heat-discolored, distorted, or work-hardened. Replace exhaust washers during every exhaust service or whenever the header is removed. A deformed washer can prevent proper clamping force and lead to exhaust gasket leaks.\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\u003eAn inexpensive part that helps maintain a proper exhaust seal. Replace with every header removal. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220322525,"sku":"00303-K","price":0.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100353ClutchGroup.png?v=1776796657"},{"product_id":"iame-ka100-exhaust-header-senior","title":"(402) IAME KA100 Exhaust Header – Senior","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust header (Senior)\u003c\/strong\u003e is the factory OEM exhaust pipe that connects the cylinder exhaust port to the exhaust silencer on the KA100 engine. This is the senior (full-size) version of the header, designed for senior class KA100 racing. The header's internal diameter and length are tuned to complement the KA100 engine's powerband characteristics.\u003c\/p\u003e\n\u003cp\u003eThe exhaust header is a critical tuning component on a two-stroke engine — its dimensions directly affect exhaust pulse timing, scavenging efficiency, and overall power output. The header mounts to the cylinder via two exhaust studs and connects to the silencer via a flexible spring. Replace the header if it shows cracks, dents, heavy corrosion, or if the mounting flange is warped.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Senior (full-size) exhaust header\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100 — senior class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 header pipe\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA damaged or dented header alters exhaust pulse timing and costs power. Inspect regularly and replace when necessary. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220355293,"sku":"IAH-02000","price":73.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_402_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-exhaust-header-junior","title":"(402) IAME KA100 Exhaust Header – Junior 22mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust header (Junior 22mm)\u003c\/strong\u003e is the junior-class version of the factory OEM exhaust pipe for the KA100 engine. This header features a 22mm internal diameter, which is smaller than the senior header, and is designed to restrict exhaust flow for junior class KA100 racing. The smaller diameter alters the powerband to produce less peak power, making it appropriate for younger and lighter drivers in junior categories.\u003c\/p\u003e\n\u003cp\u003eThe junior header is mandated by class regulations in junior KA100 divisions. Using the wrong header (senior vs junior) will result in a technical inspection failure. Always verify your class rules to confirm which header is required. The junior header mounts identically to the senior version — same exhaust studs, same silencer connection.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Junior exhaust header, 22mm internal diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100 — junior class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 header pipe\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRequired for junior KA100 classes. Do not substitute the senior header — it will not pass tech. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220420829,"sku":"IAH-02011","price":73.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_402a_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-exhaust-gasket","title":"(404) IAME KA100 Exhaust Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust gasket\u003c\/strong\u003e seals the junction between the exhaust header and the cylinder exhaust port on the KA100 engine. This gasket prevents exhaust gas leaks at the header flange, which is critical for maintaining proper exhaust pulse timing, back-pressure, and overall engine performance. An exhaust leak also creates a safety concern from hot exhaust gases escaping near the driver.\u003c\/p\u003e\n\u003cp\u003eReplace this gasket every time the exhaust header is removed from the cylinder. Exhaust gaskets are subjected to extreme temperatures and will not reseal properly once they have been compressed and heat-cycled. A fresh gasket is cheap insurance against a performance-robbing exhaust leak.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100 — exhaust header to cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep several in your spares kit — you will need a fresh one every time the header comes off. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220453597,"sku":"B-75360","price":9.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_404_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-exhaust-stud-bolt","title":"(405) IAME KA100 Exhaust Stud Bolt 8x36mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust stud bolt (8x36mm)\u003c\/strong\u003e is the threaded stud that mounts the exhaust header to the cylinder on the KA100 engine. Two of these studs thread into the cylinder exhaust port flange and protrude through the header flange, where they are secured with exhaust nuts (IAA-20300). The exhaust studs provide the clamping force that holds the header tight against the exhaust gasket.\u003c\/p\u003e\n\u003cp\u003eExhaust studs endure extreme heat cycling and can seize in the cylinder threads over time. Use anti-seize compound during installation to prevent future removal issues. Replace any stud that is bent, stripped, corroded, or has damaged threads. Broken exhaust studs are a common and frustrating problem — always carry spares.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100 cylinder — exhaust port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 stud (order 2 per exhaust)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eApply anti-seize to the cylinder-side threads during installation. A seized exhaust stud can ruin your day. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220486365,"sku":"B-75355","price":9.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_405_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-silencer-end-cap","title":"(406) IAME KA100 Silencer End Cap","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 silencer end cap\u003c\/strong\u003e is the replaceable outlet cap on the exhaust silencer (muffler) of the KA100 engine. This end cap controls the final exhaust outlet size and is a common wear item that degrades from exhaust heat, corrosion, and carbon buildup over time. A damaged or corroded end cap can affect exhaust back-pressure, altering engine performance.\u003c\/p\u003e\n\u003cp\u003eInspect the silencer end cap at every race event for corrosion holes, cracking, or excessive carbon buildup restricting the outlet. Some sanctioning bodies have specific rules about end cap condition and outlet size — a damaged cap may not pass technical inspection. Replacing just the end cap is much more economical than replacing the entire silencer.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e IAME KA100 exhaust silencer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 end cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn end cap is one of the cheapest exhaust repairs you can make. Replace before it becomes a tech issue. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220519133,"sku":"IAH-04301","price":46.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_406_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-exhaust-silencer","title":"(407) IAME KA100 Exhaust Silencer","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust silencer\u003c\/strong\u003e is the factory OEM muffler for the KA100 100cc reed-jet kart engine. The silencer reduces exhaust noise to comply with track and sanctioning body sound level requirements while maintaining the correct exhaust back-pressure for optimal engine performance. It connects to the exhaust header via a flexible spring and mounts to the chassis with a standard silencer bracket. \u003c\/p\u003e\n\u003cp\u003eThe KA100 silencer is a mandated component for all sanctioned racing — running without a silencer or with a non-compliant silencer will result in disqualification. Over time, the internal packing material degrades, carbon builds up, and the steel shell corrodes from exhaust moisture. Replace the silencer when noise levels increase beyond track limits or when internal restriction reduces engine performance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 silencer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your engine sounds louder than usual, the silencer packing is likely deteriorating. Replace before you get black-flagged for noise. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220551901,"sku":"IAH-04000","price":300.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_407_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-exhaust-flexible-spring","title":"(408) IAME KA100 Exhaust Flexible Spring","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 exhaust flexible spring\u003c\/strong\u003e connects the exhaust header to the silencer on the KA100 engine. This coiled spring provides a flexible, vibration-absorbing link between the header pipe and the silencer body, allowing both components to move independently without cracking or breaking from chassis flex and vibration during racing.\u003c\/p\u003e\n\u003cp\u003eThis spring is cross-compatible with IAME KF1-2 and KZ exhaust systems that use the same header-to-silencer connection. Over time, exhaust springs lose their tension from heat cycling and can stretch, corrode, or break. A broken spring allows the silencer to separate from the header, which is a safety hazard and will result in immediate disqualification. Inspect springs at every race event and replace at the first sign of stretching or corrosion.\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\u003eAlways carry spare exhaust springs — they are cheap and break at the worst possible moment. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220584669,"sku":"IFH-55100","price":10.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_408_Exhaust_Group.png?v=1776809223"},{"product_id":"iame-ka100-complete-gasket-set","title":"(420A) IAME KA100 Complete Gasket Set","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 complete gasket set\u003c\/strong\u003e includes all the gaskets needed for a full engine rebuild of the KA100 100cc reed-jet engine. This factory OEM gasket kit contains the head gasket O-ring, cylinder base gasket, exhaust gasket, reed block gasket, crankcase gaskets, and all other sealing components required to reassemble the KA100 from top to bottom.\u003c\/p\u003e\n\u003cp\u003ePurchasing the complete gasket set is more economical and convenient than ordering each gasket individually, and ensures you have every seal you need for a comprehensive rebuild. Always use fresh gaskets during any engine rebuild — reusing old gaskets is a false economy that leads to leaks, poor performance, and potential engine damage.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Full gasket set for top-end and bottom-end rebuild\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 complete set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe smart choice for any full KA100 rebuild. One kit covers everything so you are not chasing individual gaskets. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47831220617437,"sku":"IAZ-125992","price":45.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_420a_Exhaust_Group.png?v=1776809223"},{"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/collections\/CMC_KA100_Exhaust_Group_and_Gaskets.png?v=1776179541","url":"https:\/\/cmckarting.com\/collections\/ka100-exhaust-group-and-gaskets.oembed","provider":"CMC Karting","version":"1.0","type":"link"}