{"product_id":"namura-020-over-bore-top-end-rebuild-kit-for-honda-z50r-crf50f-xr50r-39-5mm","title":"Namura .020 Over Bore Top End Rebuild Kit for Honda Z50R, CRF50F \u0026 XR50R 39.5mm","description":"\u003ch2\u003e.020 Over Bore Top End Rebuild Kit for Honda Z50R, CRF50F \u0026amp; XR50R 39.5mm\u003c\/h2\u003e\u003cp\u003eThis .020 over bore top end rebuild kit from Namura includes a 39.5mm piston, rings, wrist pin, circlips, and all necessary gaskets to rebuild the top end of Honda Z50R, CRF50F, and XR50R engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .020 over bore top end rebuild kit from Namura provides all components for a complete top end rebuild on Honda Z50R, CRF50F, and XR50R engines. The .020 over bore piston ensures a tight fit after cylinder boring. This top end rebuild kit includes piston, rings, pin, circlips, and gaskets for a thorough overhaul.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIncludes 39.5mm aluminum alloy piston for lightweight strength\u003c\/li\u003e\n\u003cli\u003eChrome ring set for reduced wear and long life\u003c\/li\u003e\n\u003cli\u003eHigh-strength wrist pin and circlips for secure connection\u003c\/li\u003e\n\u003cli\u003eComplete gasket set for leak-free cylinder head seal\u003c\/li\u003e\n\u003cli\u003ePrecision-machined components to tight tolerances\u003c\/li\u003e\n\u003cli\u003eDesigned for use with .020 over cylinder bore\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Honda Z50R\u003c\/li\u003e\n\u003cli\u003efor Honda CRF50F\u003c\/li\u003e\n\u003cli\u003efor Honda XR50R\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine top-end rebuild and piston replacement\u003c\/li\u003e\n\u003cli\u003eCylinder boring and oversize piston installation\u003c\/li\u003e\n\u003cli\u003eRestoring compression on mini bikes and pit bikes\u003c\/li\u003e\n\u003cli\u003ePerformance restoration on Honda Z50R, CRF50F, XR50R\u003c\/li\u003e\n\u003cli\u003eDirt bike engine overhaul and maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020 over standard bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHonda Z50R, CRF50F, XR50R\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 kit include the cylinder jug? \u003cstrong\u003eA:\u003c\/strong\u003e No, this is a top end rebuild kit; the cylinder must be bored to the .020 over specification separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this piston compatible with stock cylinder heads? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes a piston designed for use with the stock cylinder head after proper boring.\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":44890372210774,"sku":"SZ1F10440","price":105.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_e8d933fa-a4d2-4012-88de-4066200f3d95.jpg?v=1781138405","url":"https:\/\/www.solidspare.com\/products\/namura-020-over-bore-top-end-rebuild-kit-for-honda-z50r-crf50f-xr50r-39-5mm","provider":"Solid Spare","version":"1.0","type":"link"}