{"product_id":"765m05400-wiseco-gp-series-std-piston-kit-for-yamaha-yz125-1997-2004-54-mm","title":"765M05400 Wiseco GP Series Std Piston Kit for Yamaha YZ125 1997-2004 54 mm","description":"\u003ch2\u003eWiseco GP Series Std Piston Kit for Yamaha YZ125\u003c\/h2\u003e\u003cp\u003eThis Wiseco GP Series standard bore piston kit, cross-referenced as 765M05400, is a 54.00 mm forged piston assembly that restores compression and top-end power to two-stroke YZ125 engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco GP Series piston kit is a 54.00 mm standard bore replacement built for Yamaha YZ125 two-stroke engines. The forged piston and matched components refresh top-end sealing and compression so the engine pulls cleanly through the rev range. It suits riders and mechanics rebuilding a worn or seized YZ125 top end.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eForged piston construction for high-strength durability under two-stroke heat and load\u003c\/li\u003e\n\u003cli\u003eStandard 54.00 mm bore size for direct replacement of the original piston\u003c\/li\u003e\n\u003cli\u003eGP Series profile engineered for competitive motocross and off-road use\u003c\/li\u003e\n\u003cli\u003eKit includes piston, rings, wrist pin, and circlips for a complete top-end refresh\u003c\/li\u003e\n\u003cli\u003ePrecision machined skirt and ring grooves for consistent sealing and long service life\u003c\/li\u003e\n\u003cli\u003eCross-referenced as 765M05400 for easy parts identification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ125 1997\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 1998\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 1999\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 2000\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 2001\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 2002\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 2003\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ125 2004\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds on motocross tracks and practice bikes\u003c\/li\u003e\n\u003cli\u003eTrail and woods riding where clean throttle response matters\u003c\/li\u003e\n\u003cli\u003eRacing applications requiring reliable compression across a full moto\u003c\/li\u003e\n\u003cli\u003ePreventive maintenance when measured piston-to-cylinder clearance is out of spec\u003c\/li\u003e\n\u003cli\u003eEngine refresh after a seizure, lean condition, or overheating event\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\u003e765M05400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e54.00 mm standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGP Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eForged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwo-stroke\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 Do I need to measure the cylinder before installing this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the cylinder bore should be checked for wear and roundness so the correct piston-to-cylinder clearance is confirmed before assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this a complete top-end kit? \u003cstrong\u003eA:\u003c\/strong\u003e It includes the piston, rings, wrist pin, and circlips, but gaskets, bearings, and cylinder work are separate unless otherwise noted.\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":51140069589078,"sku":"OO1C22506","price":395.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_a2fec81a-b5a6-4fba-9032-1b98838a5657.jpg?v=1794565922","url":"https:\/\/www.solidspare.com\/products\/765m05400-wiseco-gp-series-std-piston-kit-for-yamaha-yz125-1997-2004-54-mm","provider":"Solid Spare","version":"1.0","type":"link"}