{"title":"IAME KA100 Crank, Crank Case \u0026 Rod Parts","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eIAME KA100 Crank, Crank Case \u0026amp; Rod Parts Collection\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cscribe-shadow id=\"crxjs-ext\" data-crx=\"okfkdaglfjjjfefdcppliegebpoegaii\" style=\"position: fixed; width: 0px; height: 0px; top: 0px; left: 0px; z-index: 2147483647; overflow: visible; visibility: visible;\"\u003e\u003c\/scribe-shadow\u003e\u003c\/p\u003e","products":[{"product_id":"iame-ka100-crankcase-assembly","title":"(25A) IAME KA100 Crankcase Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 crankcase assembly\u003c\/strong\u003e is the complete factory OEM lower engine case for the KA100 100cc reed-jet two-stroke kart engine. This crankcase houses the crankshaft, main bearings, oil seals, and connecting rod assembly, and serves as the structural foundation of the entire engine. Manufactured by IAME at their facility in Zingonia, Italy, this crankcase is machined to factory tolerances for precise bearing alignment and seal fitment.\u003c\/p\u003e\n\u003cp\u003eThe KA100 crankcase accepts the standard IAME KA100 crankshaft assembly, 6205 TNH\/C4 main bearings, and drive\/magneto side oil seals. It mounts to the cylinder via tie-rods and to the chassis via a standard IAME two-stroke motor mount pattern. This part is used across all major North American karting series running the KA100 class including SKUSA, USPKS, and WKA.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bare crankcase only — bearings, seals, crankshaft, and hardware sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplace the crankcase if it has sustained damage from a bearing failure, has stripped or damaged stud threads, or shows cracks from impact. This is a major engine component — ensure all mating surfaces are clean and flat before assembly. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175739613,"sku":"IAB-01041\/1","price":780.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100Crankcase.png?v=1776187706"},{"product_id":"iame-ka100-m6x55-socket-head-bolt","title":"(26) IAME KA100 M6x55 Socket Head Bolt – Long Crankcase Bolt","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 M6x55 socket head bolt\u003c\/strong\u003e is the long crankcase bolt used on the IAME KA100 engine. This 6mm x 55mm socket head cap screw (Allen bolt) secures the crankcase halves and is one of the primary fasteners holding the bottom end of the engine together. Proper torque on these bolts is critical to maintaining crankcase seal integrity and bearing alignment.\u003c\/p\u003e\n\u003cp\u003eThis is the longer of the two crankcase bolt lengths used on the KA100. The shorter bolt (M6x45, part number 00049-K) is used in the remaining positions. Always replace crankcase bolts if threads show any signs of stretching, galling, or damage. Use a calibrated torque wrench during assembly per the IAME service manual specifications.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e M6 x 55mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Socket head cap screw (Allen bolt)\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep spare crankcase bolts on hand for race weekends. A stripped or damaged bolt during a crankcase split can sideline your day. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175772381,"sku":"00051-K","price":1.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100LongCrankcaseBolt.png?v=1776188262"},{"product_id":"iame-ka100-m6x45-socket-head-bolt","title":"(26B) IAME KA100 M6x45 Socket Head Bolt – Short Crankcase Bolt","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 M6x45 socket head bolt\u003c\/strong\u003e is the short crankcase bolt used on the IAME KA100 engine. This 6mm x 45mm socket head cap screw (Allen bolt) secures the crankcase halves in the shorter bolt positions. Together with the longer M6x55 bolts (part number 00051-K), these fasteners hold the bottom end of the KA100 engine together and maintain crankcase seal integrity.\u003c\/p\u003e\n\u003cp\u003eThis is the shorter of the two crankcase bolt lengths used on the KA100. Always inspect crankcase bolts for thread damage or stretching during every bottom-end service. Use a calibrated torque wrench and follow the IAME service manual torque sequence when assembling the crankcase halves.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e M6 x 45mm\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInexpensive fasteners that are worth replacing during any major bottom-end rebuild. Keep spares in your toolbox. Available at CMC Karting.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175805149,"sku":"00049-K","price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100ShortCrankcaseBolt.png?v=1776189607"},{"product_id":"iame-ka100-cylinder-tie-rod","title":"(27) IAME KA100 Cylinder Tie-Rod 8x157mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 cylinder tie-rod\u003c\/strong\u003e is the threaded stud that runs from the crankcase up through the cylinder, providing the clamping force that holds the cylinder barrel to the crankcase. This 8mm x 157mm tie-rod is one of four studs that secure the cylinder assembly and must be in good condition to maintain proper clamping force and gasket seal.\u003c\/p\u003e\n\u003cp\u003eThe tie-rods thread into the crankcase and protrude through the cylinder base flange. The cylinder head nuts then thread onto the top of these studs to clamp the entire top-end assembly together. Damaged, bent, or stripped tie-rods must be replaced to avoid uneven clamping that can lead to head gasket failure or cylinder base leaks.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 tie-rod\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInspect tie-rods for thread damage during every top-end rebuild. Replace any studs with damaged or stretched threads. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175837917,"sku":"E-38345","price":15.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_cylinder_tie-rod.png?v=1776190111"},{"product_id":"iame-ka100-oil-seal","title":"(28) IAME KA100 Oil Seal – Magneto\/Drive Side","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 oil seal\u003c\/strong\u003e is the factory OEM crankshaft seal used on both the magneto (ignition) side and the drive (clutch\/PTO) side of the KA100 crankcase. These seals prevent crankcase pressure loss and keep contaminants out of the bearing area. Proper seal integrity is essential for maintaining crankcase compression, which directly affects two-stroke engine performance.\u003c\/p\u003e\n\u003cp\u003eThe KA100 uses one seal on each side of the crankshaft where it exits the crankcase. Both seals are the same part number. Oil seals should be replaced during every major bottom-end rebuild, or anytime the crankshaft is removed from the case. A leaking crank seal is one of the most common causes of poor idle, lean conditions, and inconsistent power on two-stroke kart engines.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 seal (order 2 per engine for both sides)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways install new seals with the correct orientation (lip facing inward toward crankcase pressure). Use a proper seal driver to avoid damage during installation. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175870685,"sku":"X30125425A","price":16.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100oilseal.png?v=1776190320"},{"product_id":"iame-ka100-crankshaft-steel-shim","title":"(30) IAME KA100 Crankshaft Steel Shim – 0.10 \/ 0.15mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 crankshaft steel shim\u003c\/strong\u003e is used to set the correct crankshaft end-play (axial clearance) within the crankcase. Proper end-play is critical for crankshaft longevity and smooth engine operation. Too much end-play allows the crank to shuttle back and forth, causing seal wear and inconsistent ignition timing. Too little end-play can cause the crank to bind as temperatures rise.\u003c\/p\u003e\n\u003cp\u003eAvailable in two thicknesses — 0.10mm and 0.15mm — these shims are installed on the crankshaft during bottom-end assembly to achieve the target end-play specification. Measure end-play with a dial indicator and select the appropriate shim combination to bring the measurement within the IAME service manual tolerance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 shim\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCrankshaft end-play is a precision measurement — always use a dial indicator, never guess. Keep both thicknesses in your spares kit for bottom-end rebuilds. Available at CMC Karting.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"0.10mm","offer_id":47787175903453,"sku":"30407","price":3.92,"currency_code":"USD","in_stock":true},{"title":"0.15mm","offer_id":47787438112989,"sku":"30404","price":3.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100CrankshaftSteelShim.png?v=1776190454"},{"product_id":"iame-ka100-main-bearing-6205","title":"(31) IAME KA100 Main Bearing 6205 TNH\/C4","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 main bearing (6205 TNH\/C4)\u003c\/strong\u003e is the factory-specified crankshaft main bearing for the KA100 engine. This is a 6205-size ball bearing with TNH (polyamide\/nylon cage) and C4 clearance rating, designed to handle the high RPM and thermal demands of competitive two-stroke kart racing. The KA100 uses two main bearings — one on each side of the crankshaft.\u003c\/p\u003e\n\u003cp\u003eMain bearings should be inspected during every bottom-end service and replaced if they exhibit roughness, play, or noise when spun by hand. Most engine builders recommend replacing main bearings at every full rebuild as a preventive measure. Always press bearings in and out using proper tooling to avoid damaging the crankcase bores.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 bearing (order 2 per engine)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA failed main bearing can destroy the crankcase, crankshaft, and seals in seconds. Replace them proactively during rebuilds. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787175968989,"sku":"35396-G","price":22.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100MainBearing6205.png?v=1776190754"},{"product_id":"iame-ka100-crankshaft-assembly","title":"(32A) IAME KA100 Crankshaft Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 crankshaft assembly\u003c\/strong\u003e is the complete factory OEM crankshaft for the KA100 100cc reed-jet kart engine. This is a fully assembled, press-fit crankshaft including both crank halves, crankpin, big end cage, connecting rod, and small end bearing — ready to install into the crankcase with new main bearings and seals.\u003c\/p\u003e\n\u003cp\u003eThe KA100 crankshaft is a precision-balanced assembly that converts piston reciprocation into rotational force. It is manufactured and assembled at the IAME factory to strict tolerance and balance specifications. The crankshaft interfaces with 6205 TNH\/C4 main bearings on both sides, and the drive (PTO) side accepts the clutch drum assembly while the magneto side mounts the ignition stator and flywheel.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings\/Seals:\u003c\/strong\u003e Sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplace the crankshaft assembly when the big end bearing develops play, the rod shows signs of fatigue, or the crank halves are out of true. This is the heart of the bottom end — a failing crank will destroy the entire engine. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176001757,"sku":"IAC-00100","price":895.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100CrankshaftAssembly.png?v=1776190939"},{"product_id":"iame-ka100-small-end-roller-cage","title":"(35) IAME KA100 Small End Roller Cage – Silver","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 small end roller cage (Silver)\u003c\/strong\u003e is the needle bearing cage that sits at the small end (piston pin end) of the connecting rod. This bearing allows the piston pin to rotate smoothly within the connecting rod eye while handling the high loads and speeds of the KA100 engine. The silver designation indicates the standard tolerance cage used in OEM KA100 assemblies.\u003c\/p\u003e\n\u003cp\u003eThe small end roller cage is a wear item that should be inspected during every top-end service. Look for flat spots on the needle rollers, cage cracks, or discoloration from heat. Most engine builders recommend replacing the small end cage at every major rebuild alongside the piston and ring.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 cage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn small end bearing causes a distinctive metallic rattling sound and will eventually lead to piston pin seizure if not replaced. Cheap insurance for a reliable bottom end. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176034525,"sku":"E-10440","price":38.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100SmallEndRollerCage.png?v=1776191076"},{"product_id":"iame-ka100-crankpin","title":"(37) IAME KA100 Crankpin 20x47mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 crankpin\u003c\/strong\u003e is the hardened steel pin that connects the two crankshaft halves through the big end of the connecting rod. This 20mm diameter x 47mm length pin is the critical link in the rotating assembly, transmitting the combustion force from the piston and rod to the crankshaft.\u003c\/p\u003e\n\u003cp\u003eThe crankpin is press-fit into the crank halves during crankshaft assembly and works with the big end cage bearing (X30125431) and silver bronze thrust washers (X30125436). Crankpin replacement requires complete crankshaft disassembly using the proper IAME crank assembly\/disassembly tooling. This is typically a job for an experienced engine builder with the correct press fixtures.\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\u003eReplace the crankpin if it shows scoring, pitting, discoloration, or is out of round as measured with a micrometer. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176067293,"sku":"IAC-40140","price":37.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100Crankpin20x47mm.png?v=1776191483"},{"product_id":"iame-ka100-big-end-cage","title":"(38) IAME KA100 Big End Cage","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 big end cage\u003c\/strong\u003e is the needle roller bearing cage that surrounds the crankpin at the big end of the connecting rod. This bearing allows the connecting rod to rotate freely on the crankpin while handling the extreme loads generated during combustion and high-RPM operation. The big end cage works in conjunction with the crankpin and silver bronze thrust washers.\u003c\/p\u003e\n\u003cp\u003eBig end bearing condition is one of the most critical inspection items during a bottom-end rebuild. A worn or damaged big end cage allows excessive play between the rod and crank, causing a distinctive deep knocking sound and leading to rapid failure if not addressed. Always replace the big end cage during a full crankshaft rebuild.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 cage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNever reuse a big end cage that shows any sign of wear. The cost of a new cage is trivial compared to the damage a failed big end causes. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176132829,"sku":"X30125431","price":73.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_Big_End_Cage.png?v=1776191646"},{"product_id":"iame-ka100-silver-bronze-washer","title":"(39) IAME KA100 Silver Bronze Thrust Washer","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 silver bronze thrust washer\u003c\/strong\u003e is installed on each side of the connecting rod big end, between the rod and the crankshaft cheeks. These washers control the lateral (side-to-side) movement of the connecting rod on the crankpin and provide a smooth bearing surface for the rod to thrust against during operation.\u003c\/p\u003e\n\u003cp\u003eThe KA100 uses two thrust washers per crankshaft — one on each side of the big end. They should be replaced during every crankshaft rebuild or whenever they show scoring, thinning, or uneven wear patterns. Worn thrust washers allow excessive rod side-play, which affects engine efficiency and can lead to accelerated wear on the big end cage.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 washer (order 2 per crankshaft)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways replace thrust washers in pairs during a crank rebuild. Measure rod side-play after assembly to verify it falls within the IAME specification. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176165597,"sku":"X30125436","price":11.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_Silver_Bronze_Thrust_Washer.png?v=1776191744"},{"product_id":"iame-ka100-connecting-rod-assembly","title":"(40A) IAME KA100 Connecting Rod Assembly – 102mm","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 connecting rod assembly\u003c\/strong\u003e is the factory OEM con-rod for the KA100 100cc reed-jet engine, with a 102mm center-to-center length and 47mm crankpin bore. This is a complete rod assembly that connects the piston to the crankshaft, converting the linear piston motion into rotational crankshaft motion. The rod is machined and balanced by IAME to factory specifications.\u003c\/p\u003e\n\u003cp\u003eThe connecting rod interfaces with the small end roller cage at the piston pin end and the big end cage at the crankpin end. It is a precision component that must be in perfect condition for the engine to run reliably at racing RPM. Inspect the rod for straightness, big end bore roundness, and small end bore condition during every bottom-end rebuild.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 rod assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA bent or worn connecting rod will cause uneven piston wear, vibration, and eventual catastrophic failure. Replace if any inspection measurements fall outside IAME tolerances. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176198365,"sku":"ENC50100-47","price":454.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100connectingrod.png?v=1776191961"},{"product_id":"iame-ka100-shaft-end-key","title":"(42) IAME KA100 Magneto\/Sprocket Shaft End Key","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 magneto\/sprocket shaft end key\u003c\/strong\u003e is the small woodruff-style key that locks the ignition flywheel and the clutch sprocket assembly to the crankshaft. This key sits in a machined keyway in the crankshaft and prevents the mounted components from spinning freely on the shaft. Proper key engagement is critical for maintaining correct ignition timing and clutch drive alignment.\u003c\/p\u003e\n\u003cp\u003eA sheared or worn shaft key will cause ignition timing to shift unpredictably, resulting in poor performance, detonation risk, or a no-start condition. Always inspect the key and keyway during bottom-end service. Replace the key if it shows any signs of deformation, rounding, or shearing.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 key\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOne of the cheapest parts on the engine but one of the most critical. Always carry spares. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176231133,"sku":"10375","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100magnetokey.png?v=1776192113"},{"product_id":"iame-ka100-m10x1-ignition-nut","title":"(45) IAME KA100 M10x1 Ignition Nut","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 M10x1 ignition nut\u003c\/strong\u003e is the fastener that secures the magneto flywheel to the crankshaft on the ignition side of the KA100 engine. This 10mm x 1mm fine-thread nut must be torqued to the correct specification to keep the flywheel firmly seated on the crankshaft taper and shaft key. A loose flywheel nut can cause ignition timing drift, key shearing, and potential flywheel separation.\u003c\/p\u003e\n\u003cp\u003eAlways use a calibrated torque wrench when installing the flywheel nut. Inspect the nut threads and the crankshaft threads for damage during every ignition service. The fine M10x1 thread pitch requires care to avoid cross-threading.\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\u003eReplace if threads show any damage or if the nut does not torque smoothly. Keep a spare in your toolbox. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176296669,"sku":"00382","price":2.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_Ignition_Nut.png?v=1776192254"},{"product_id":"iame-ka100-m10-flat-washer-magneto","title":"(50) IAME KA100 M10 Flat Washer for Magneto Flywheel","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 M10 flat washer\u003c\/strong\u003e is used under the magneto flywheel nut on the ignition side of the KA100 crankshaft. This 10mm flat washer provides proper load distribution between the flywheel nut and the flywheel surface, ensuring even clamping force and preventing damage to the flywheel hub face during torquing.\u003c\/p\u003e\n\u003cp\u003eAlways use a washer under the flywheel nut — omitting it can cause the nut to dig into the flywheel surface, making future removal difficult and potentially damaging the flywheel. Replace the washer if it shows signs of deformation, galling, or uneven wear from the flywheel nut. Use in combination with the M10x1 flywheel nut (part number 00382).\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 simple but essential fastener for proper flywheel installation. Keep spares on hand. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176362205,"sku":"00305-K.1","price":0.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100flatwasherm10.png?v=1776192393"},{"product_id":"iame-ka100-wavy-lock-washer-magneto","title":"(54) IAME KA100 Wavy Lock Washer for Magneto Flywheel M10","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 wavy lock washer\u003c\/strong\u003e is a 10mm wave-style locking washer used in the magneto flywheel assembly on the ignition side of the KA100 crankshaft. The wavy (wave spring) design provides a constant preload force that resists loosening from vibration, helping keep the flywheel nut secure under the extreme vibration environment of a racing kart engine.\u003c\/p\u003e\n\u003cp\u003eThis washer is used in conjunction with the M10x1 flywheel nut (00382) and M10 flat washer (00305-K) to create a secure, vibration-resistant flywheel mounting stack. The 10.5mm x 18mm x 0.8mm dimensions are specific to the KA100 flywheel fastening configuration. Replace the wavy washer during any ignition or bottom-end service.\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\u003eDo not substitute flat washers for this wavy lock washer — the wave spring action is specifically designed to maintain preload on the flywheel stack. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176394973,"sku":"00342-K.1","price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100wavylockwasher.png?v=1776192503"},{"product_id":"iame-ka100-pto-side-crank-half","title":"(72) IAME KA100 PTO Side Crank Half","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 PTO side crank half\u003c\/strong\u003e is the clutch-side crankshaft half for the KA100 100cc reed-jet engine. This is the crank web that carries the PTO (power take-off) shaft where the clutch drum and drive sprocket assembly mount. The PTO crank half is press-fit onto the crankpin along with the connecting rod and big end bearing during crankshaft assembly.\u003c\/p\u003e\n\u003cp\u003eIndividual crank halves are typically replaced when the crankshaft needs rebuilding due to worn bearing journals, damaged keyways, or out-of-true conditions. Replacing a single crank half rather than the complete crankshaft assembly can be more economical when only one side is damaged. However, crankshaft assembly requires specialized press tooling and precise alignment — this is engine builder work.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 crank half\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCrankshaft assembly is a precision operation — always have the completed crank trued and balanced after pressing new halves. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176558813,"sku":"GBP-125386","price":350.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCKA100PTOSideCrankHalf.png?v=1776192647"},{"product_id":"iame-ka100-magneto-side-crank-half","title":"(73) IAME KA100 Magneto Side Crank Half","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 magneto side crank half\u003c\/strong\u003e is the ignition-side crankshaft half for the KA100 engine. This crank web carries the magneto shaft where the ignition flywheel and stator assembly mount. The magneto crank half is press-fit onto the crankpin along with the connecting rod and big end bearing during crankshaft assembly.\u003c\/p\u003e\n\u003cp\u003eThis part is also cross-compatible with IAME Leopard MY'09 engines that share the same crankshaft architecture. Individual crank halves are replaced when rebuilding a crankshaft with a worn bearing journal, damaged taper, or stripped keyway on the magneto side. Crankshaft assembly requires specialized IAME press tooling and precise alignment to ensure proper trueness and balance.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 crank half\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAs with the PTO half, always true and balance the completed crankshaft after pressing. This is not a field repair — use proper tooling. Available at CMC Karting.\u003c\/p\u003e\n\u003cp\u003e\u003cscribe-shadow id=\"crxjs-ext\" data-crx=\"okfkdaglfjjjfefdcppliegebpoegaii\" style=\"position: fixed; width: 0px; height: 0px; top: 0px; left: 0px; z-index: 2147483647; overflow: visible; visibility: visible;\"\u003e\u003c\/scribe-shadow\u003e\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176591581,"sku":"IAC-30141","price":273.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_Crankshaft_Half_Magneto_Side.png?v=1776192758"},{"product_id":"iame-ka100-crank-plastic-stuffer-kit","title":"(74) IAME KA100 Crank Plastic Stuffer Kit","description":"\u003cp\u003eThe \u003cstrong\u003eIAME KA100 crank plastic stuffer kit\u003c\/strong\u003e includes a crankcase stuffer piece and mounting screws. Crank stuffers fill dead volume inside the crankcase cavity, which improves crankcase compression efficiency and helps optimize primary compression on the two-stroke engine. Better crankcase compression translates to improved fuel\/air charge transfer through the ports and a stronger powerband.\u003c\/p\u003e\n\u003cp\u003eThis kit includes one plastic stuffer piece and the screws required for installation. The stuffer mounts inside the crankcase and must be properly clearanced to avoid contact with the rotating crankshaft assembly. Verify fitment and clearance before running the engine. This is a standard OEM component used in the KA100 factory configuration.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e 1 plastic stuffer piece + mounting screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplace the crank stuffer if it shows cracks, melting, or wear from contact with the crankshaft assembly. Proper clearance is essential — always verify before reassembly. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47787176624349,"sku":"DBP-09505-K","price":38.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_Crank_Stuffer_1.png?v=1776193048"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/collections\/CMC_KA100_Crank_Crank_Case_Rod_Parts_Diagram.png?v=1775175222","url":"https:\/\/cmckarting.com\/collections\/iame-ka100-crank-crank-case-rod-parts.oembed","provider":"CMC Karting","version":"1.0","type":"link"}