{"product_id":"namura-nx-10051k-top-end-kit-for-honda-crf50f-flat-top-39-mm-standard-bore-11-1-compression","title":"NAMURA NX-10051K Top End Kit for Honda CRF50F, Flat Top 39 mm Standard Bore, 11:1 Compression","description":"\u003cp\u003eRestore top-end performance with the NAMURA NX-10051K Top End Kit, designed for 2004–2009 and 2011–2014 Honda CRF50F models. This standard-bore, flat-top piston kit is engineered for reliable fitment and includes the essential components needed for a complete top-end rebuild, including the piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit. The kit is suited for Honda CRF50F applications using the 39 mm standard-bore configuration and an 11:1 compression ratio.\u003c\/p\u003e\u003cp\u003eThe NAMURA piston uses a hypereutectic casting process that increases silicon content to help control expansion, improve wear resistance, and withstand elevated cylinder temperatures. Its MOS2, or Teflon\/molybdenum, coated skirts are applied using a rolled-on process designed to create a durable bond while reducing friction, improving heat transfer, and helping minimize the risk of cold seizures. These features support dependable operation in recreational riding, maintenance, and engine restoration applications.\u003c\/p\u003e\u003cp\u003eThe piston also features a machined-smooth head to reflect combustion heat and help reduce carbon buildup, protecting the piston crown during operation. An anodized dome adds heat resistance and durability for extended service life. Manufactured by NAMURA and identified by manufacturer part number NX-10051K, this top-end kit is a practical replacement solution for rebuilding compatible Honda CRF50F engines. Vendor part number 185-1051 is included for product reference and ordering.\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\u003eFitment: Designed for 2004–2009 and 2011–2014 Honda CRF50F models\u003c\/li\u003e\n\u003cli\u003eStandard-Bore Configuration: 39 mm standard-bore piston with an 11:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eMOS2-Coated Skirts: Rolled-on Teflon\/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 on the piston\u003c\/li\u003e\n\u003cli\u003eAnodized Dome: Provides increased heat resistance and durability\u003c\/li\u003e\n\u003cli\u003eHypereutectic Casting: Higher silicon content helps control expansion and improve wear resistance\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: NAMURA NX-10051K\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 185-1051\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2000 Honda XR50R\u003cbr\u003e\n2001 Honda XR50R\u003cbr\u003e\n2002 Honda XR50R\u003cbr\u003e\n2003 Honda XR50R\u003cbr\u003e\n2004 Honda CRF50F\u003cbr\u003e\n2005 Honda CRF50F\u003cbr\u003e\n2006 Honda CRF50F\u003cbr\u003e\n2007 Honda CRF50F\u003cbr\u003e\n2008 Honda CRF50F\u003cbr\u003e\n2009 Honda CRF50F\u003cbr\u003e\n2011 Honda CRF50F\u003cbr\u003e\n2012 Honda CRF50F\u003cbr\u003e\n2013 Honda CRF50F\u003cbr\u003e\n2014 Honda CRF50F\u003cbr\u003e\n2015 Honda CRF50F\u003cbr\u003e\n2016 Honda CRF50F","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67560900493547,"sku":"185-1051","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/984c-5d76d54c6e666.jpg?v=1790774672","url":"https:\/\/ctracingservices.com\/products\/namura-nx-10051k-top-end-kit-for-honda-crf50f-flat-top-39-mm-standard-bore-11-1-compression","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}