{"product_id":"namura-040-over-bore-piston-kit-for-yamaha-big-bear-400-1993-1999-kodiak-84mm","title":"Namura .040 Over Bore Piston Kit for Yamaha Big Bear 400 \u0026 1993-1999 Kodiak 84mm","description":"\u003ch2\u003eNamura .040 Over Bore Piston Kit for Yamaha\u003c\/h2\u003e\u003cp\u003eThis Namura .040 over bore piston kit is designed to replace the factory piston in Yamaha Big Bear 400 and 1993-1999 Kodiak models, restoring compression and performance with an 84mm bore diameter.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura .040 over bore piston kit is a direct replacement for Yamaha Big Bear 400 and Kodiak ATVs from 1993-1999, featuring an 84mm bore size to refresh worn cylinders. This .040 over bore piston kit includes the piston, rings, and wrist pin for a complete top-end rebuild.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum piston with precision-machined ring grooves\u003c\/li\u003e\n\u003cli\u003e.040 inch oversize allows cylinder wall cleanup without reboring to next size\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary rings and wrist pin for installation\u003c\/li\u003e\n\u003cli\u003eManufactured by Namura, a trusted aftermarket brand for powersports\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha Big Bear 400\u003c\/li\u003e\n\u003cli\u003efor Yamaha Kodiak 1993-1999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding top-end on Yamaha Big Bear 400 ATVs\u003c\/li\u003e\n\u003cli\u003eRestoring compression on higher-mileage Kodiak engines\u003c\/li\u003e\n\u003cli\u003ePerformance rebuilds requiring oversize pistons\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\u003e84mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 inch\u003c\/td\u003e\n\u003c\/tr\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\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin\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 piston kit require any machining to install? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the cylinder must be bored to .040 inch over the standard size to accommodate this piston; always have the work done by a qualified machine shop.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this kit be used in other Yamaha models? \u003cstrong\u003eA:\u003c\/strong\u003e It is specifically designed for Yamaha Big Bear 400 and Kodiak 1993-1999 with 84mm bore; other models would require different sizing and fitment verification.\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":44890731806806,"sku":"SZ1F12871","price":153.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_578622de-48a2-4bb6-ac28-9c682c799e14.jpg?v=1781143341","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-kit-for-yamaha-big-bear-400-1993-1999-kodiak-84mm","provider":"Solid Spare","version":"1.0","type":"link"}