{"product_id":"namura-na-40005k-standard-82-95-mm-top-end-kit-for-yamaha-wolverine-and-grizzly-350","title":"NAMURA NA-40005K Standard 82.95 mm Top End Kit for Yamaha Wolverine and Grizzly 350","description":"\u003cp\u003eThe NAMURA NA-40005K Standard Top End Kit is designed for select Yamaha 350 ATV engines, including the YFM350X Wolverine 2WD and YFM350FG Grizzly 4WD. This complete kit includes a piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit for a convenient engine rebuild solution. The piston features an 11:1 compression ratio and a standard bore application for dependable fitment and performance.\u003c\/p\u003e\u003cp\u003eFeature: MOS2 Teflon\/molybdenum-coated skirts use a rolled-on application process that creates a durable bond while helping improve heat transfer, reduce friction, and minimize the risk of cold seizures. Machined-smooth piston heads help reflect combustion heat and reduce carbon buildup, supporting piston protection during operation.\u003c\/p\u003e\u003cp\u003eFeature: Anodized domes improve heat resistance and durability, while the hypereutectic casting process provides increased silicon content for controlled expansion, enhanced wear resistance, and improved tolerance of elevated cylinder temperatures. These features help support consistent operation in demanding off-road environments.\u003c\/p\u003e\u003cp\u003eFitment includes 2006-2009 Yamaha YFM350X Wolverine 2WD models with SRA, along with 2007-2012 Yamaha YFM350FG Grizzly 4WD models with SRA. Verify the vehicle model, year, bore specification, and engine configuration before installation. The manufacturer part number is NA-40005K, and the vendor part number is 186-4005.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit\u003c\/li\u003e\n\u003cli\u003eStandard 82.95 mm bore with an 11:1 compression ratio for select Yamaha 350 ATV engines\u003c\/li\u003e\n\u003cli\u003eMOS2 Teflon\/molybdenum-coated piston skirts help reduce friction, improve heat transfer, and minimize cold-seizure risk\u003c\/li\u003e\n\u003cli\u003eMachined-smooth piston head helps reflect combustion heat and reduce carbon buildup\u003c\/li\u003e\n\u003cli\u003eAnodized dome increases heat resistance and piston durability\u003c\/li\u003e\n\u003cli\u003eHypereutectic casting process provides controlled expansion, wear resistance, and improved high-temperature performance\u003c\/li\u003e\n\u003cli\u003eFits 2006-2009 Yamaha YFM350X Wolverine 2WD with SRA\u003c\/li\u003e\n\u003cli\u003eFits 2007-2012 Yamaha YFM350FG Grizzly 4WD with SRA\u003c\/li\u003e\n\u003cli\u003eBrand: NAMURA\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: NA-40005K\u003c\/li\u003e\n\u003cli\u003eVendor part number: 186-4005\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1987 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1987 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1987 Yamaha YFM350X Warrior\u003cbr\u003e\n1988 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1988 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1988 Yamaha YFM350X Warrior\u003cbr\u003e\n1989 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1989 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1989 Yamaha YFM350X Warrior\u003cbr\u003e\n1990 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1990 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1990 Yamaha YFM350X Warrior\u003cbr\u003e\n1991 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1991 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1991 Yamaha YFM350X Warrior\u003cbr\u003e\n1992 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1992 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1992 Yamaha YFM350X Warrior\u003cbr\u003e\n1993 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1993 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1993 Yamaha YFM350X Warrior\u003cbr\u003e\n1994 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1994 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1994 Yamaha YFM350X Warrior\u003cbr\u003e\n1995 Yamaha YFM350ER Moto-4\u003cbr\u003e\n1995 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1995 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n1995 Yamaha YFM350X Warrior\u003cbr\u003e\n1996 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1996 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n1996 Yamaha YFM350U Big Bear 2WD [SRA]\u003cbr\u003e\n1996 Yamaha YFM350X Warrior\u003cbr\u003e\n1997 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1997 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n1997 Yamaha YFM350U Big Bear 2WD [SRA]\u003cbr\u003e\n1997 Yamaha YFM350X Warrior\u003cbr\u003e\n1998 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1998 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n1998 Yamaha YFM350U Big Bear 2WD [SRA]\u003cbr\u003e\n1998 Yamaha YFM350X Warrior\u003cbr\u003e\n1999 Yamaha YFM350FW Big Bear 4WD [SRA]\u003cbr\u003e\n1999 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n1999 Yamaha YFM350U Big Bear 2WD [SRA]\u003cbr\u003e\n1999 Yamaha YFM350X Warrior\u003cbr\u003e\n2000 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2000 Yamaha YFM350X Warrior\u003cbr\u003e\n2001 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2001 Yamaha YFM350X Warrior\u003cbr\u003e\n2002 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2002 Yamaha YFM350X Warrior\u003cbr\u003e\n2003 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2003 Yamaha YFM350X Warrior\u003cbr\u003e\n2004 Yamaha YFM350BA Bruin 2WD [SRA]\u003cbr\u003e\n2004 Yamaha YFM350FA Bruin 4WD [SRA]\u003cbr\u003e\n2004 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2004 Yamaha YFM350R Raptor\u003cbr\u003e\n2004 Yamaha YFM350X Warrior\u003cbr\u003e\n2005 Yamaha YFM350BA Bruin 2WD [SRA]\u003cbr\u003e\n2005 Yamaha YFM350FA Bruin 4WD [SRA]\u003cbr\u003e\n2005 Yamaha YFM350FX Wolverine 4WD [SRA]\u003cbr\u003e\n2005 Yamaha YFM350R Raptor\u003cbr\u003e\n2006 Yamaha YFM350BA Bruin 2WD [SRA]\u003cbr\u003e\n2006 Yamaha YFM350FA Bruin 4WD [SRA]\u003cbr\u003e\n2006 Yamaha YFM350R Raptor\u003cbr\u003e\n2006 Yamaha YFM350X Wolverine 2WD [SRA]\u003cbr\u003e\n2007 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2007 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2007 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2007 Yamaha YFM350R Raptor\u003cbr\u003e\n2007 Yamaha YFM350X Wolverine 2WD [SRA]\u003cbr\u003e\n2008 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2008 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2008 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2008 Yamaha YFM350R Raptor\u003cbr\u003e\n2008 Yamaha YFM350X Wolverine 2WD [SRA]\u003cbr\u003e\n2009 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2009 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2009 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2009 Yamaha YFM350R Raptor\u003cbr\u003e\n2009 Yamaha YFM350X Wolverine 2WD [SRA]\u003cbr\u003e\n2010 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2010 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2010 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2010 Yamaha YFM350R Raptor\u003cbr\u003e\n2011 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2011 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2011 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2011 Yamaha YFM350R Raptor\u003cbr\u003e\n2012 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2012 Yamaha YFM350FGI Grizzly 4WD [IRS]\u003cbr\u003e\n2012 Yamaha YFM350G Grizzly 2WD [SRA]\u003cbr\u003e\n2012 Yamaha YFM350R Raptor\u003cbr\u003e\n2013 Yamaha YFM350FG Grizzly 4WD [SRA]\u003cbr\u003e\n2013 Yamaha YFM350R Raptor\u003cbr\u003e\n2014 Yamaha YFM350FG Grizzly 4WD [SRA]","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67559048773867,"sku":"186-4005","price":127.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/8a6b-5e94e08076eaf.jpg?v=1790769949","url":"https:\/\/ctracingservices.com\/products\/namura-na-40005k-standard-82-95-mm-top-end-kit-for-yamaha-wolverine-and-grizzly-350","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}