{"product_id":"namura-standard-bore-top-end-rebuild-kit-size-c-for-yamaha-yz450f-2020-2022-97mm","title":"Namura Standard Bore Top End Rebuild Kit Size C for Yamaha YZ450F 2020-2022 97mm","description":"\u003ch2\u003eNamura Standard Bore Top End Rebuild Kit Size C for Yamaha\u003c\/h2\u003e\u003cp\u003eThis top end rebuild kit for the 2020-2022 Yamaha YZ450F features a piston, rings, gasket set, and wrist pin to refresh 97mm bore performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Top End Rebuild Kit Size C is a complete overhaul set for the Yamaha YZ450F, delivering a cast piston, ring pack, gaskets, and wrist pin for a factory-spec rebuild. It targets the 97mm bore to restore compression and eliminate blow-by. This kit is ideal for riders performing routine top end service on their motocross machine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast piston engineered for low expansion and stable clearances under heat\u003c\/li\u003e\n\u003cli\u003eHigh-tensile steel rings maintain consistent cylinder wall contact\u003c\/li\u003e\n\u003cli\u003eFull gasket kit includes head, base, and exhaust seals for leak-free assembly\u003c\/li\u003e\n\u003cli\u003eWrist pin with hardened surface reduces wear at the rod and piston bore\u003c\/li\u003e\n\u003cli\u003eVerified 97mm size matches the OEM cylinder bore without machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha YZ450F 2020-2022\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMotocross practice and race days requiring a dependable top end replacement\u003c\/li\u003e\n\u003cli\u003eEngine rebuild after hours of high-rpm track use to prevent piston failure\u003c\/li\u003e\n\u003cli\u003eRestoring lost power from worn rings and piston\u003c\/li\u003e\n\u003cli\u003ePre-season maintenance to ensure consistent performance across the season\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e97mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha YZ450F (2020-2022)\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 Do I need to adjust piston-to-wall clearance with this kit? \u003cstrong\u003eA:\u003c\/strong\u003e No, the Size C piston is pre-sized for a 97mm bore and follows OEM specifications, so no additional clearance work is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this kit without removing the engine? \u003cstrong\u003eA:\u003c\/strong\u003e The top end can be serviced with the engine in the frame, but the cylinder head and cylinder must be lifted to access the piston.\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":44949899444310,"sku":"SZ1F16093","price":373.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_2df49da6-f37c-4ac6-ba2f-580dcf8d6a6c.jpg?v=1781401158","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-top-end-rebuild-kit-size-c-for-yamaha-yz450f-2020-2022-97mm","provider":"Solid Spare","version":"1.0","type":"link"}