{"product_id":"namura-standard-bore-size-a-top-end-repair-kit-for-yamaha-yz250-1992-1994-68mm","title":"Namura Standard Bore Size A Top End Repair Kit for Yamaha YZ250 1992-1994 68mm","description":"\u003ch2\u003eNamura Standard Bore Size A Top End Repair Kit for Yamaha YZ250 1992-1994 68mm\u003c\/h2\u003e\u003cp\u003eThis top end repair kit rebuilds the cylinder assembly of Yamaha YZ250 two-stroke motorcycles, providing piston, rings, pin, and bearings to restore lost compression and power. It is designed for the 1992-1994 YZ250 and includes size A components with a 68mm bore.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Size A Top End Repair Kit is a complete piston and ring set designed for the Yamaha YZ250 from 1992 to 1994. It replaces worn top end parts to revive engine performance and reliability. This kit is a direct-fit solution for riders wanting to refresh their top end without machining.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePremium 68mm piston with advanced skirt coating reduces friction\u003c\/li\u003e\n\u003cli\u003eMoly‑coated rings provide excellent cylinder seal and longevity\u003c\/li\u003e\n\u003cli\u003ePrecision‑ground wrist pin and c‑clip bearings included\u003c\/li\u003e\n\u003cli\u003eSize A grading ensures proper clearance within factory specifications\u003c\/li\u003e\n\u003cli\u003eKit includes both needle bearing and thrust washer for complete rebuild\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\u003eMotocross track racing requiring high‑rev reliability\u003c\/li\u003e\n\u003cli\u003eOff‑road trail and enduro riding demanding consistent power\u003c\/li\u003e\n\u003cli\u003eRebuilding a high‑hour engine to restore original performance\u003c\/li\u003e\n\u003cli\u003eCompetition or recreational two‑stroke maintenance\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\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha YZ250 1992‑1994\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2‑Stroke Single Cylinder\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 Do I need to rebore my cylinder for this kit? \u003cstrong\u003eA:\u003c\/strong\u003e No, the Size A piston is designed for a standard bore cylinder that is within factory wear limits. Measure your cylinder before ordering to confirm it still meets spec.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit include a gasket set? \u003cstrong\u003eA:\u003c\/strong\u003e The kit contains the piston assembly, rings, pin, and bearing but does not include a base gasket or cylinder head gasket. Those should be purchased separately for a proper rebuild.\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":44949749203030,"sku":"SZ1F14001","price":192.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_1711ed75-f72c-4442-a289-128b50dfde5a.jpg?v=1781397923","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-a-top-end-repair-kit-for-yamaha-yz250-1992-1994-68mm","provider":"Solid Spare","version":"1.0","type":"link"}