{"product_id":"namura-standard-bore-size-a-top-end-kit-for-ktm-250-sx-exc-xc-xc-w-66-4mm","title":"Namura Standard Bore Size A Top End Kit for KTM 250 SX, EXC, XC, XC-W 66.4mm","description":"\u003ch2\u003eStandard Bore Size A Top End Kit for KTM\u003c\/h2\u003e\u003cp\u003eThis top end kit delivers a direct-replacement cylinder, piston, and rings for KTM 250 SX, EXC, XC, and XC-W models, featuring a 66.4mm standard bore size A for restoring factory compression and power.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis top end kit is a complete piston-and-cylinder assembly designed for KTM 250 two-stroke off-road and motocross bikes. It restores original performance by replacing worn top-end components with a 66.4mm bore and matched parts. Ideal for riders rebuilding their KTM 250 engine after hours of hard riding.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined cylinder with a 66.4mm bore for exact OEM fitment\u003c\/li\u003e\n\u003cli\u003eIncludes piston, rings, wrist pin, and circlips for a complete top-end overhaul\u003c\/li\u003e\n\u003cli\u003eCast piston with low-friction ring pack ensures reliable break-in and longevity\u003c\/li\u003e\n\u003cli\u003eDesigned for standard bore size A to match factory specifications\u003c\/li\u003e\n\u003cli\u003eManufactured to strict tolerances for consistent compression and power delivery\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 EXC\u003c\/li\u003e\n\u003cli\u003efor KTM 250 XC\u003c\/li\u003e\n\u003cli\u003efor KTM 250 XC-W\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMotocross racing on tracks with high-rev demands\u003c\/li\u003e\n\u003cli\u003eEnduro and cross-country trail riding requiring reliability\u003c\/li\u003e\n\u003cli\u003eHard off-road use where top-end durability is critical\u003c\/li\u003e\n\u003cli\u003eRebuilding a high-hour engine to restore performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTop End Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e66.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKTM 250 SX, EXC, XC, XC-W\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 Does this top end kit include a gasket set? \u003cstrong\u003eA:\u003c\/strong\u003e This kit includes the piston, rings, wrist pin, and circlips but does not include a separate gasket set; a top end gasket kit is sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this kit without special tools? \u003cstrong\u003eA:\u003c\/strong\u003e Installation requires basic engine assembly tools and a torque wrench; we recommend following the factory service manual for proper procedures.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44949760606294,"sku":"SZ1F14256","price":197.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_f17d183a-37c6-402f-a123-70c4ea3ab638.jpg?v=1781398221","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-a-top-end-kit-for-ktm-250-sx-exc-xc-xc-w-66-4mm","provider":"Solid Spare","version":"1.0","type":"link"}