{"product_id":"namura-standard-bore-size-b-top-end-repair-kit-for-yamaha-yz250-1992-1994-68mm","title":"Namura Standard Bore Size B Top End Repair Kit for Yamaha YZ250 1992-1994 68mm","description":"\u003ch2\u003eNamura Standard Bore Size B Top End Repair Kit for Yamaha YZ250 1992-1994\u003c\/h2\u003e\u003cp\u003eThis top end repair kit for Yamaha YZ250 models from 1992-1994 includes a piston, rings, pin, and gaskets to restore cylinder compression and performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Size B Top End Repair Kit for Yamaha YZ250 1992-1994 is a complete cylinder rebuild set designed to bring worn engines back to factory spec. This 68mm bore kit includes a cast piston, ring set, wrist pin, and top end gaskets. Ideal for riders restoring a YZ250 dirt bike from the early nineties.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-cast piston for consistent expansion and long life\u003c\/li\u003e\n\u003cli\u003eMatched ring set for optimal cylinder seal\u003c\/li\u003e\n\u003cli\u003eIncludes all required gaskets for a complete top end rebuild\u003c\/li\u003e\n\u003cli\u003eStandard bore size B (68mm) direct replacement for OEM components\u003c\/li\u003e\n\u003cli\u003eDesigned for Yamaha YZ250 1992-1994 models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ250 1992\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250 1993\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250 1994\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed to rebuild top end on YZ250 motocross bikes\u003c\/li\u003e\n\u003cli\u003eRestores lost power and compression after hours of riding\u003c\/li\u003e\n\u003cli\u003eIdeal for routine engine maintenance and performance restoration\u003c\/li\u003e\n\u003cli\u003eSuitable for recreational trail riding and competitive motocross\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYZ250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1992-1994\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e68mm (Standard Size B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Wrist Pin, Gaskets\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 Is this a direct replacement for the original Yamaha piston? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is designed as a direct replacement for the OEM top end components in the specified Yamaha YZ250 models. Confirm serial number compatibility before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the difference between Size B and Size C? \u003cstrong\u003eA:\u003c\/strong\u003e The sizes indicate different piston clearances; use the size that matches the cylinder's measured bore. Standard Size B is for cylinders within 68mm specification.\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":44949749235798,"sku":"SZ1F14002","price":192.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_1d053b47-951d-4195-b2ff-141e2c301bda.jpg?v=1781397924","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-b-top-end-repair-kit-for-yamaha-yz250-1992-1994-68mm","provider":"Solid Spare","version":"1.0","type":"link"}