{"product_id":"cylinder-piston-top-end-kit-for-yamaha-big-bear-kodiak-400-1993-12-4gb-11638-00","title":"Cylinder Piston Top End Kit for Yamaha Big Bear Kodiak 400 1993-12 4GB-11638-00","description":"\u003ch2\u003eCylinder Piston Top End Kit for Yamaha Big Bear Kodiak 400\u003c\/h2\u003e\u003cp\u003eThis cylinder piston top end kit for Yamaha Big Bear and Kodiak 400 models references OEM 4GB-11638-00, supplying a replacement cylinder, piston, and gasket set for upper engine rebuilds.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis cylinder piston top end kit for Yamaha Big Bear and Kodiak 400 machines provides a matched cylinder, piston, and gasket set for upper engine service. The top end kit for Yamaha Big Bear 400 suits owners rebuilding a worn or scored top end at home. It references OEM 4GB-11638-00 for easy cross-checking against the original part number.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCylinder and piston matched as a set for consistent clearance\u003c\/li\u003e\n\u003cli\u003eGasket set seals base, head, and covers during assembly\u003c\/li\u003e\n\u003cli\u003eCross-references OEM 4GB-11638-00\u003c\/li\u003e\n\u003cli\u003eRestores compression lost to ring and bore wear\u003c\/li\u003e\n\u003cli\u003eComplete upper end refresh in one kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha Big Bear 400 1993-2012\u003c\/li\u003e\n\u003cli\u003efor Yamaha Kodiak 400 1993-2012\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding the top end on 400cc Yamaha ATV engines\u003c\/li\u003e\n\u003cli\u003eReplacing scored or out-of-spec cylinders\u003c\/li\u003e\n\u003cli\u003eFarm, trail, and utility riding where compression loss shows\u003c\/li\u003e\n\u003cli\u003eScheduled engine refresh on high-hour machines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4GB-11638-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCylinder piston top end kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Fitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha 400 single-cylinder ATV engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCylinder, piston, gasket set\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 How do I confirm OEM 4GB-11638-00 matches my machine? \u003cstrong\u003eA:\u003c\/strong\u003e Cross-check the number against your parts diagram or old cylinder before ordering. Serial number and model year can affect fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this kit without machining the cases? \u003cstrong\u003eA:\u003c\/strong\u003e A matched cylinder and piston kit normally bolts on without case machining when the bore matches stock. Verify clearances and torque specs from your service manual.\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":50554056802390,"sku":"ZZ3M03231","price":145.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_8b57766b-b128-4167-bb15-7c85913e2a8c.jpg?v=1790879210","url":"https:\/\/www.solidspare.com\/products\/cylinder-piston-top-end-kit-for-yamaha-big-bear-kodiak-400-1993-12-4gb-11638-00","provider":"Solid Spare","version":"1.0","type":"link"}