Description & Size Guide
Stroker CrankshaftFactory 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.
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.Yamaha YFZ 450 2004-2013 Yamaha YFZ 450 BB 2006-2007 Yamaha YFZ 450 LE 2004 Yamaha YFZ 450 SE 2005-2007 Yamaha YFZ 450 SP 2006-2008 Yamaha YFZ 450 SP2 2008 Yamaha YFZ 450 SPE2 2007
This item fits to following bikes.
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