{"product_id":"namura-standard-bore-size-b-top-end-repair-kit-for-yamaha-yz250-1999-2001-66-4mm","title":"Namura Standard Bore Size B Top End Repair Kit for Yamaha YZ250 1999-2001 66.4mm","description":"\u003ch2\u003eNamura Standard Bore Size B Top End Repair Kit for Yamaha\u003c\/h2\u003e\u003cp\u003eThis Namura Standard Bore Size B Top End Repair Kit is a complete top-end rebuild kit for Yamaha YZ250 models from 1999 to 2001, featuring a 66.4mm bore size and including piston, rings, wrist pin, and clips.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Size B Top End Repair Kit provides everything needed to refresh the top end of a Yamaha YZ250. It includes a precision-machined piston with rings, a wrist pin, and clips, all designed to meet OEM standards. This top end kit is a direct replacement for Yamaha YZ250 models from 1999-2001, ensuring optimal performance and longevity.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIncludes a forged aluminum piston for strength and light weight\u003c\/li\u003e\n\u003cli\u003eFeatures a chrome-plated ring set for reduced friction\u003c\/li\u003e\n\u003cli\u003eWrist pin and clips pre-installed for quick installation\u003c\/li\u003e\n\u003cli\u003eManufactured to exacting tolerances for a perfect fit\u003c\/li\u003e\n\u003cli\u003eCompatible with standard bore size B (66.4mm)\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\u003eUsed during top-end rebuilds for motocross and off-road racing\u003c\/li\u003e\n\u003cli\u003eIdeal for restoring lost compression and power\u003c\/li\u003e\n\u003cli\u003eCommonly installed by riders and mechanics to maintain peak engine performance\u003c\/li\u003e\n\u003cli\u003eEssential for competitive racing and recreational riding\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\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\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is included in the top end kit? \u003cstrong\u003eA:\u003c\/strong\u003e The kit includes a piston, rings, wrist pin, and clips, all pre-assembled for easy installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the bore size? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is for standard bore size B, which is 66.4mm for Yamaha YZ250 models from 1999-2001.\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":44890936541270,"sku":"SZ1F13643","price":175.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_49514390-4877-4ebd-8727-d0c7731c6e91.jpg?v=1781144393","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-b-top-end-repair-kit-for-yamaha-yz250-1999-2001-66-4mm","provider":"Solid Spare","version":"1.0","type":"link"}