{"product_id":"namura-standard-bore-size-c-top-end-repair-kit-for-yamaha-yz250-1999-2001-66-4mm","title":"Namura Standard Bore Size C Top End Repair Kit for Yamaha YZ250 1999-2001 66.4mm","description":"\u003ch2\u003eNamura Standard Bore Size C Top End Repair Kit for Yamaha YZ250 (1999-2001, 66.4mm)\u003c\/h2\u003e\u003cp\u003eThis top end repair kit replaces the piston, rings, wrist pin, and circlips for Yamaha YZ250 models from 1999 to 2001 with a 66.4mm bore, restoring compression and engine performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Size C Top End Repair Kit is a direct replacement for the original piston assembly in Yamaha YZ250 two-stroke engines. It includes all necessary components to refresh the top end, ensuring reliable power delivery and extended engine life. This kit is designed for riders who need a dependable rebuild solution for their YZ250.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined piston from high‑silicon aluminum alloy for durability\u003c\/li\u003e\n\u003cli\u003eIncludes rings, wrist pin, and circlips for a complete top‑end overhaul\u003c\/li\u003e\n\u003cli\u003eStandard bore size 66.4mm matches OEM specifications\u003c\/li\u003e\n\u003cli\u003eDesigned for Yamaha YZ250 1999‑2001 models\u003c\/li\u003e\n\u003cli\u003eNamura aftermarket quality at a competitive price point\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha YZ250 (1999‑2001)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMotocross and off‑road racing applications\u003c\/li\u003e\n\u003cli\u003eTrail riding and enduro events\u003c\/li\u003e\n\u003cli\u003eTop‑end rebuilds during engine maintenance intervals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\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\u003eKit Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Bore Top End Repair Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1999‑2001\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 kit include gaskets? \u003cstrong\u003eA:\u003c\/strong\u003e This top end repair kit includes the piston, rings, wrist pin, and circlips; cylinder base and head gaskets are typically sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Are there different bore size options? \u003cstrong\u003eA:\u003c\/strong\u003e This is the standard 66.4mm bore size; oversize options may be available if you are boring the cylinder.\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":44949738487894,"sku":"SZ1F13666","price":175.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_2974b1fb-e386-40dd-a7d0-8d23b950810b.jpg?v=1781397509","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-c-top-end-repair-kit-for-yamaha-yz250-1999-2001-66-4mm","provider":"Solid Spare","version":"1.0","type":"link"}