4073 - Hot Rods Crankshaft Assembly For Yamaha YFZ450 2012-2013

Features: Sold complete with the original proven Hot Rods connecting rods, top-end bearings (unless otherwise noted) and crankshaft webs. Factory assembled and trued to OEM specifications; meets or exceeds OEM in performance and durability. Complete and ready for installation. Completely rebuildable with genuine Hot Rods connecting rods and bearings (unless otherwise noted). Gears are made at a quality level of DIN class 9 or higher. Makes '04-'05 with +1.40 mm stroke into a true 450 cc. '06-'08 has a standard stroke. When using Cylinder Works #21001-K01 makes into 478 cc Uses stock piston. Does not fit fuel injected R or X models. Connecting rod side clearance is 0.20 mm - 0.55 mm..