{"product_id":"namura-size-b-66-35mm-piston-kit-for-ktm-250-sx-mxc-exc-standard-bore-66-4mm","title":"Namura Size B (66.35mm) Piston Kit for KTM 250 SX MXC \u0026 EXC Standard Bore 66.4mm","description":"\u003ch2\u003eNamura Size B (66.35mm) Piston Kit for KTM\u003c\/h2\u003e\u003cp\u003eThis Size B (66.35mm) piston kit from Namura fits KTM 250 SX, MXC, and EXC models with a standard bore of 66.4mm.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Size B piston kit is a high-quality replacement for KTM 250 two-stroke engines, sized at 66.35mm for standard bore applications. It is designed for KTM 250 SX, MXC, and EXC models requiring a direct-fit piston. This kit includes all necessary components for a complete piston replacement.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePremium aluminum alloy construction for lightweight strength\u003c\/li\u003e\n\u003cli\u003eSize B (66.35mm) for standard bore 66.4mm cylinders\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings, wrist pin, and circlips\u003c\/li\u003e\n\u003cli\u003eEngineered for high-revving two-stroke KTM engines\u003c\/li\u003e\n\u003cli\u003eRigorous quality control from Namura for reliable performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor KTM 250 SX\u003c\/li\u003e\n\u003cli\u003efor KTM 250 MXC\u003c\/li\u003e\n\u003cli\u003efor KTM 250 EXC\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding KTM 250 two-stroke engines for motocross and enduro\u003c\/li\u003e\n\u003cli\u003eRestoring compression in high-mileage 250 SX\/MXC\/EXC machines\u003c\/li\u003e\n\u003cli\u003ePerformance rebuilds for off-road racing and trail riding\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSize B (66.35mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard Bore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e66.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKTM 250 SX \/ MXC \/ EXC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What does Size B mean in a piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e Size B indicates a slight oversize compared to standard, typically used to compensate for minor cylinder wear while staying close to stock bore dimensions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit fit all years of KTM 250 SX? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is designed for a range of model years, but always verify your cylinder bore and piston clearance with your specific engine serial number before installation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44890474545238,"sku":"SZ1F11458","price":131.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_dbdfd956-5e12-4267-bfbc-5cb6ebf13008.jpg?v=1781140096","url":"https:\/\/www.solidspare.com\/products\/namura-size-b-66-35mm-piston-kit-for-ktm-250-sx-mxc-exc-standard-bore-66-4mm","provider":"Solid Spare","version":"1.0","type":"link"}