{"product_id":"namura-standard-bore-size-c-top-end-kit-for-honda-crf250r-fits-2016-2017-76-8mm","title":"Namura Standard Bore Size C Top End Kit for Honda CRF250R fits 2016-2017 76.8mm","description":"\u003ch2\u003eNamura Standard Bore Size C Top End Kit for Honda\u003c\/h2\u003e\u003cp\u003eThis top end kit from Namura is a direct replacement cylinder and piston assembly designed to restore compression and power in Honda CRF250R engines from 2016-2017. Featuring a 76.8mm bore size (Standard C), it provides a reliable OEM-style fit and performance for high-revving four-stroke motocross engines. Whether rebuilding or upgrading, this top end kit ensures consistent power delivery and longevity.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Size C Top End Kit is a complete cylinder and piston package built for the 2016-2017 Honda CRF250R. It includes a cast piston, rings, wrist pin, circlips, and cylinder assembly, delivering everything needed for a top-end overhaul. This top end kit is ideal for riders seeking a direct replacement that maintains the factory bore size of 76.8mm without the need for boring or honing.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast piston with precision-machined ring grooves for optimal sealing\u003c\/li\u003e\n\u003cli\u003eHeat-treated cylinder sleeve resists wear and maintains consistent clearance\u003c\/li\u003e\n\u003cli\u003eIncludes wrist pin and circlips for secure installation\u003c\/li\u003e\n\u003cli\u003eDesigned to match OEM compression ratio and power characteristics\u003c\/li\u003e\n\u003cli\u003eDrop-in replacement - no additional machining required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Honda CRF250R (2016-2017)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMotocross racing and track days\u003c\/li\u003e\n\u003cli\u003eTrail riding and enduro competitions\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds and performance restoration\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\u003e76.8mm (Standard C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2016-2017 Honda CRF250R\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, Cylinder Assembly\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 top end kit require re-sleeving? \u003cstrong\u003eA:\u003c\/strong\u003e No, the cylinder is supplied with a pre-installed sleeve matched to the bore size, so installation is a direct swap after cleaning the crankcase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the recommended break-in procedure for this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Follow standard engine break-in: a few heat cycles with varying RPM, avoiding sustained high loads for the first hour of operation.\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":44949831188566,"sku":"SZ1F15411","price":285.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_5ae673d6-f6c0-4f46-83f8-1a6ed2d5942d.jpg?v=1781399737","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-c-top-end-kit-for-honda-crf250r-fits-2016-2017-76-8mm","provider":"Solid Spare","version":"1.0","type":"link"}