{"product_id":"namura-060-over-bore-piston-kit-for-yamaha-yz250-yz250x-fits-1999-2024-67-9mm","title":"Namura .060 Over Bore Piston Kit for Yamaha YZ250 \u0026 YZ250X fits 1999-2024 67.9mm","description":"\u003ch2\u003e.060 Over Bore Piston Kit for Yamaha\u003c\/h2\u003e\u003cp\u003eThis .060 over bore piston kit for Yamaha provides a high-performance replacement piston with rings and pin for YZ250 and YZ250X models from 1999 to 2024, sized at 67.9mm.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .060 over bore piston kit for Yamaha is designed to restore compression and power in aged or worn cylinders. It is an ideal choice for rebuilding Yamaha YZ250 and YZ250X engines from 1999 through 2024. Namura's piston kit delivers a precise fit and reliable performance for off-road and motocross use.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBore size .060 over (1.5mm oversize) for worn cylinders\u003c\/li\u003e\n\u003cli\u003ePrecision-machined 67.9mm piston diameter\u003c\/li\u003e\n\u003cli\u003eIncludes high-quality piston rings and wrist pin\u003c\/li\u003e\n\u003cli\u003eDesigned for high-compression applications\u003c\/li\u003e\n\u003cli\u003eEngineered for durability in Yamaha YZ engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ250 (1999-2024)\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250X (1999-2024)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding top end of Yamaha YZ250 and YZ250X\u003c\/li\u003e\n\u003cli\u003eMotocross racing demanding high-reliability\u003c\/li\u003e\n\u003cli\u003eTrail riding and off-road competition\u003c\/li\u003e\n\u003cli\u003ePerformance engine upgrades after cylinder wear\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 Oversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.060 in (1.5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e67.9 mm\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 piston kit suitable for a 2005 YZ250? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this piston kit fits Yamaha YZ250 models from 1999 to 2024. Confirm your cylinder bore condition before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the advantage of a .060 over bore piston? \u003cstrong\u003eA:\u003c\/strong\u003e A .060 over bore piston allows you to clean up a worn or scored cylinder while increasing displacement slightly, restoring compression and power.\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":44890494304342,"sku":"SZ1F11946","price":138.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_480285dd-cc25-46b5-a339-f9e64ac44557.jpg?v=1781140730","url":"https:\/\/www.solidspare.com\/products\/namura-060-over-bore-piston-kit-for-yamaha-yz250-yz250x-fits-1999-2024-67-9mm","provider":"Solid Spare","version":"1.0","type":"link"}