{"product_id":"hot-rods-0921-0039-4149-stroker-crankshaft-crankshaft-assembly-stroker-yamaha-4149","title":"Hot Rods 4-Cycle Crankshaft Assembly - 4149 Yamaha YZ 250 2003-2013","description":"\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFactory assembled and trued to OEM specifications\u003c\/li\u003e\n\u003cli\u003eDrop in replacement crankshaft requires no modification unless noted \u003c\/li\u003e\n\u003cli\u003eCNC machined and dynamically balanced to suit the increased stroke\u003c\/li\u003e\n\u003cli\u003eAdd +2.00 mm to +4.00 mm of stroke depending on application\u003c\/li\u003e\n\u003cli\u003eUses stock piston unless noted\u003c\/li\u003e\n\u003cli\u003eMain bearings not included \u003c\/li\u003e\n\u003cli\u003eCan be matched with Cylinder Works Big Bore cylinders to get significant displacement and horsepower gains\u003c\/li\u003e\n\u003cli\u003eNot re-buildable as the rods are shorter than OEM.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke Length\u003c\/td\u003e\n\u003ctd\u003e56,60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eStroker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eCrankshaft Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\/Finish\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e4140 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003eStandard Crankshaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiding Style\u003c\/td\u003e\n\u003ctd\u003eOff-Road\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke Length\u003c\/td\u003e\n\u003ctd\u003e56.60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnits\u003c\/td\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplacement\u003c\/td\u003e\n\u003ctd\u003e264 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e4-Cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003ch2\u003ePart Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConnecting rod side clearance is 0.25 mm - 0.45 mm.\u003c\/li\u003e\n\u003cli\u003e+3.00 mm stroke increase makes 264 cc.\u003c\/li\u003e\n\u003cli\u003eUses stock piston.\u003c\/li\u003e\n\u003cli\u003eBolt in and go.\u003c\/li\u003e\n\u003cli\u003eWhen using Cylinder Works big bore cylinder kit it will make 285 cc.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e","brand":"HOT RODS","offers":[{"title":"Default Title","offer_id":46503405486297,"sku":"0921-0039","price":592.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/0421\/8799\/files\/2E06AE0B-AEF4-41C5-8B08-431FC23FFE79.jpg?v=1742954743","url":"https:\/\/spazcycle.com\/products\/hot-rods-0921-0039-4149-stroker-crankshaft-crankshaft-assembly-stroker-yamaha-4149","provider":"SpazCycle","version":"1.0","type":"link"}