{"product_id":"namura-020-over-bore-top-end-kit-for-yamaha-beartracker-250-1999-2004-71-5mm","title":"Namura .020 Over Bore Top End Kit for Yamaha BearTracker 250 1999-2004 71.5mm","description":"\u003ch2\u003e.020 Over Bore Top End Kit for Yamaha\u003c\/h2\u003e\u003cp\u003eThe .020 Over Bore Top End Kit provides all parts needed to rebuild the top end of a Yamaha BearTracker 250 ATV, including a 71.5mm piston, rings, wrist pin, and gaskets designed for 1999-2004 models.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .020 Over Bore Top End Kit for Yamaha is a complete solution for rebuilding the top end of BearTracker 250 engines. It contains an oversized piston, rings, pin, and gaskets to match a cylinder bored to .020 over. This kit is intended for 1999-2004 models to bring back full compression and power.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOversized 71.5mm piston for .020 over bore application\u003c\/li\u003e\n\u003cli\u003ePrecision-ground rings for optimal cylinder sealing\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary gaskets for a complete top end seal\u003c\/li\u003e\n\u003cli\u003eWrist pin and clips for secure piston attachment\u003c\/li\u003e\n\u003cli\u003eEngineered to restore compression after cylinder wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha BearTracker 250 (1999-2004)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding top end after loss of compression due to cylinder wear\u003c\/li\u003e\n\u003cli\u003eBoring cylinder to .020 over and installing matching piston\u003c\/li\u003e\n\u003cli\u003eRestoring power on aging ATVs used for trail riding or work\u003c\/li\u003e\n\u003cli\u003eReplacing worn top end components during engine overhaul\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNamura\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha BearTracker 250 (1999-2004)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020 Over (71.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e71.5mm\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, Gaskets\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 Will this fit my 2002 BearTracker 250? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this kit fits 1999-2004 Yamaha BearTracker 250 models when the cylinder is bored to .020 over (71.5mm). Confirm your cylinder bore before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to machine my cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this is an over bore kit; your cylinder must be bored to 71.5mm to accommodate the oversized 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":44890904199254,"sku":"SZ1F13509","price":175.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_0ad8d765-faa9-4d47-8bfc-96b97ad5b204.jpg?v=1781144212","url":"https:\/\/www.solidspare.com\/products\/namura-020-over-bore-top-end-kit-for-yamaha-beartracker-250-1999-2004-71-5mm","provider":"Solid Spare","version":"1.0","type":"link"}