{"product_id":"393m06400-wiseco-std-piston-kit-for-yamaha-rd350-rd400-1973-1979-64-00mm","title":"393M06400 Wiseco Std Piston Kit for Yamaha RD350 RD400 1973-1979 64.00mm","description":"\u003ch2\u003eWiseco Std Piston Kit for Yamaha RD350 \u0026amp; RD400\u003c\/h2\u003e\u003cp\u003eThis Wiseco standard piston kit, reference 393M06400, is a 64.00 mm bore piston assembly for the Yamaha RD350 and RD400 two-stroke twins produced from 1973 through 1979.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco Std Piston Kit for Yamaha RD350 and RD400 restores factory bore size on tired two-stroke top ends. Each Wiseco piston kit for Yamaha RD350 and RD400 is forged for strength and machined to 64.00 mm so the cylinders can be honed and refreshed without going oversize. Riders rebuilding a classic RD top end get a Wiseco piston kit for Yamaha RD350 and RD400 that handles high rpm running.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eForged aluminum construction for greater strength than cast pistons\u003c\/li\u003e\n\u003cli\u003e64.00 mm standard bore size matches original cylinder dimensions\u003c\/li\u003e\n\u003cli\u003eWiseco 393M06400 series piston for the RD350 and RD400 engine family\u003c\/li\u003e\n\u003cli\u003eDesigned to withstand the stresses of a two-stroke powerband\u003c\/li\u003e\n\u003cli\u003eSuited to rebuilds where cylinders clean up at the factory bore\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha RD350 1973-1979\u003c\/li\u003e\n\u003cli\u003efor Yamaha RD400 1975-1979\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop end rebuilds on RD350 and RD400 street bikes\u003c\/li\u003e\n\u003cli\u003eRestoring a classic Yamaha two-stroke to running condition\u003c\/li\u003e\n\u003cli\u003eRefreshing cylinders that measure within standard bore spec\u003c\/li\u003e\n\u003cli\u003eVintage motorcycle engine repair work\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\u003e393M06400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard bore, forged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachine Fitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha RD350 and RD400, 1973-1979\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 What does standard bore mean on this piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e Standard bore means the piston matches the original 64.00 mm cylinder diameter before any overboring, so it fits cylinders that still measure within spec.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to measure my cylinder before ordering? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, check cylinder wear and taper first, since a worn or scored bore may need an oversize piston instead of this standard size.\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":51140129161302,"sku":"OO1C22590","price":395.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_5ab7098a-d9da-4fcd-8905-a2a34b177dd4.jpg?v=1794565978","url":"https:\/\/www.solidspare.com\/products\/393m06400-wiseco-std-piston-kit-for-yamaha-rd350-rd400-1973-1979-64-00mm","provider":"Solid Spare","version":"1.0","type":"link"}