CRANKSHAFT STKR YFZ450

Stroker Crankshaft

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 0.20 mm - 0.55 mm. +4.40 mm stroke increase for '04-'05 makes into 470 cc. +3.00 mm stroke increase for '06-'08 makes into 471 cc. When using Cylinder Works # 21001-K01 makes 500 cc. Final displacement determined by application. Uses stock piston. Does not fit fuel injected R or X models.