{"product_id":"namura-na-10000-6k-91-46-mm-1-50-mm-11-1-top-end-kit-for-honda-trx450-foreman","title":"NAMURA NA-10000-6K 91.46 mm (+1.50 mm) 11:1 Top End Kit for Honda TRX450 Foreman","description":"\u003cp\u003eThe NAMURA NA-10000-6K Top End Kit is designed for select Honda TRX450 Foreman ATVs and includes the essential components for a dependable top-end rebuild. This 91.46 mm (+1.50 mm) kit features an 11:1 compression piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit. It is engineered to support proper fitment and reliable performance when servicing a worn or damaged top end.\u003c\/p\u003e\u003cp\u003eManufactured by NAMURA, the kit uses a hypereutectic casting process that increases silicon content for reduced expansion, improved wear resistance, and greater tolerance of elevated cylinder temperatures. The piston skirts feature a rolled-on MOS2 coating made with Teflon and molybdenum. This bonded coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures. Machined smooth heads help reflect combustion heat and reduce carbon buildup, while anodized domes improve heat resistance and durability.\u003c\/p\u003e\u003cp\u003eFitment includes 1998–2004 Honda TRX450FE Foreman ES models with SRA and 1998–2000 Honda TRX450FM Foreman S models with SRA. Verify the model, year, bore requirement, and compression specification before installation. This product is identified by manufacturer part number NA-10000-6K and vendor part number 186-1006.\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\u003eBore size: 91.46 mm (+1.50 mm) piston specification for compatible Honda TRX450 Foreman applications.\u003c\/li\u003e\n\u003cli\u003eCompression ratio: 11:1 design supports the specified engine configuration.\u003c\/li\u003e\n\u003cli\u003eMOS2-coated skirts: Rolled-on Teflon and molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk.\u003c\/li\u003e\n\u003cli\u003eMachined smooth head: Helps reflect combustion heat and reduce carbon buildup.\u003c\/li\u003e\n\u003cli\u003eAnodized dome: Improves heat resistance and piston durability.\u003c\/li\u003e\n\u003cli\u003eHypereutectic construction: Higher silicon content helps reduce expansion and improve wear resistance at elevated cylinder temperatures.\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 1998–2004 Honda TRX450FE Foreman ES [SRA] and 1998–2000 Honda TRX450FM Foreman S [SRA] models.\u003c\/li\u003e\n\u003cli\u003ePart numbers: NAMURA manufacturer part number NA-10000-6K; vendor part number 186-1006.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1998 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n1998 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n1999 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n1999 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n2000 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n2000 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n2001 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n2001 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n2002 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n2002 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n2003 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n2003 Honda TRX450FM Foreman S [SRA]\u003cbr\u003e\n2004 Honda TRX450FE Foreman ES [SRA]\u003cbr\u003e\n2004 Honda TRX450FM Foreman S [SRA]","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67559277396203,"sku":"186-1006","price":131.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/5ea9-5d76d56084c77.jpg?v=1790771973","url":"https:\/\/ctracingservices.com\/products\/namura-na-10000-6k-91-46-mm-1-50-mm-11-1-top-end-kit-for-honda-trx450-foreman","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}