4170 Stroker Crankshaft Honda CRF450X 2005 2018

Features: Factory assembled and trued to OEM specifications. Drop in replacement crankshaft requires no modification unless noted . CNC machined and dynamically balanced to suit the increased stroke. Add +2.00 mm to +4.00 mm of stroke depending on application. Uses stock piston unless noted. Main bearings not included . Can be matched with Cylinder Works Big Bore cylinders to get significant displacement and horsepower gains. Not re-buildable as the rods are shorter than OEM.. Connecting rod side clearance is 0.40 mm - 0.80 mm. +3.00 mm stroke increase makes 470 cc. Uses stock piston. Bolt in. When using Cylinder Works # 1108-K01 on CRF450X it makes 500 cc. When using Cylinder Works # 1105-K01 on TRX450R it makes 500 cc..