{"product_id":"namura-standard-bore-top-end-rebuild-kit-size-b-for-honda-cr85r-cr85rb-47-5mm","title":"Namura Standard Bore Top End Rebuild Kit Size B for Honda CR85R \u0026 CR85RB 47.5mm","description":"\u003ch2\u003eStandard Bore Top End Rebuild Kit Size B for Honda\u003c\/h2\u003e\u003cp\u003eThis standard bore top end rebuild kit size B for Honda CR85R and CR85RB provides a 47.5mm piston and all necessary components to restore top-end performance in your dirt bike engine. The standard bore top end rebuild kit is built to Honda's original specifications for a direct, reliable replacement.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis standard bore top end rebuild kit size B is designed for the Honda CR85R and CR85RB, featuring a 47.5mm piston, rings, wrist pin, gaskets, and bearings. It is the ideal solution for riders needing a complete top-end refresh to regain lost power and reliability on the track or trail.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e47.5mm standard bore piston for direct OEM fitment\u003c\/li\u003e\n\u003cli\u003eKit includes piston, rings, wrist pin, circlips, gaskets, and bearings\u003c\/li\u003e\n\u003cli\u003eHigh-strength cast aluminum piston for durability\u003c\/li\u003e\n\u003cli\u003ePrecision-honed cylinder compatibility for optimal compression\u003c\/li\u003e\n\u003cli\u003eSize B specification ensures accurate sizing per Honda's service limits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Honda CR85R (all years)\u003c\/li\u003e\n\u003cli\u003efor Honda CR85RB (all years)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed during top-end rebuilds on Honda CR85 motocross bikes\u003c\/li\u003e\n\u003cli\u003eRestores compression and power for competitive racing\u003c\/li\u003e\n\u003cli\u003eIdeal for track and trail riding maintenance\u003c\/li\u003e\n\u003cli\u003eSupports extended engine life with regular replacement\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 Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHonda CR85R \u0026amp; CR85RB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Wrist Pin, Circlips, Gaskets, Bearings\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 Can this kit be used on a Honda CR85 with a different bore size? \u003cstrong\u003eA:\u003c\/strong\u003e No, this kit is specifically for 47.5mm standard bore engines; using it on other sizes may damage the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to replace the cylinder when installing this kit? \u003cstrong\u003eA:\u003c\/strong\u003e Only if the cylinder is worn beyond service limits; otherwise, the standard bore piston can be installed directly.\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":44890645856342,"sku":"SZ1F12192","price":142.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_6b0b962b-face-4908-b41c-7717f04d69de.jpg?v=1781142414","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-top-end-rebuild-kit-size-b-for-honda-cr85r-cr85rb-47-5mm","provider":"Solid Spare","version":"1.0","type":"link"}