{"product_id":"namura-standard-bore-size-a-piston-kit-for-yamaha-yfz450-yfz450r-yfz450x-95mm","title":"Namura Standard Bore Size A Piston Kit for Yamaha YFZ450, YFZ450R \u0026 YFZ450X 95mm","description":"\u003ch2\u003ePiston Kit for Yamaha YFZ450, YFZ450R \u0026amp; YFZ450X 95mm\u003c\/h2\u003e\u003cp\u003eThis Namura Standard Bore Size A piston kit is a direct replacement piston and ring set designed to restore compression and power in Yamaha YFZ450, YFZ450R, and YFZ450X engines with a 95mm bore.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Namura piston kit provides a high-quality OEM-spec replacement for the Yamaha YFZ450 series, using a durable cast-aluminum piston and precision ring set. It is intended for standard bore applications and includes the necessary components for a complete piston replacement. The kit is a reliable choice for restoring top-end performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum piston with reinforced skirt for durability\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves for consistent compression\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings, wrist pin, and circlips\u003c\/li\u003e\n\u003cli\u003eStandard bore size \"A\" ensures proper fitment without oversize machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YFZ450\u003c\/li\u003e\n\u003cli\u003efor Yamaha YFZ450R\u003c\/li\u003e\n\u003cli\u003efor Yamaha YFZ450X\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds for ATV racing and trail riding\u003c\/li\u003e\n\u003cli\u003eRestoring lost compression in high-mileage engines\u003c\/li\u003e\n\u003cli\u003ePerformance upgrades when combined with head work\u003c\/li\u003e\n\u003cli\u003eReplacement after piston seizure or ring failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNamura Standard Bore Size A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e95mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCast aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, circlips\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 piston kit require any machining? \u003cstrong\u003eA:\u003c\/strong\u003e No; it is a standard bore size \"A\" piston that fits directly into a 95mm bore without oversizing, but you should verify your cylinder bore condition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the difference between size \"A\" and other sizes? \u003cstrong\u003eA:\u003c\/strong\u003e Size \"A\" indicates the standard nominal diameter; other letters (B, C) denote slight oversizes for cylinders that have been honed or bored oversize.\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":44949775417430,"sku":"SZ1F14701","price":230.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_685da7e7-00a7-4a2d-9d47-10a7d723468f.jpg?v=1781398773","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-a-piston-kit-for-yamaha-yfz450-yfz450r-yfz450x-95mm","provider":"Solid Spare","version":"1.0","type":"link"}