HOT RODS STROKER CRANKSHAFT COMPLETE ATV YAMAHA YFZ 450 04-09/ 12-

Heavy Duty (04-05) (+4.4mm stroke) makes 470cc. Uses stock piston. Heavy Duty (06-08) (+3mm stroke) makes 471cc. Uses stock piston. When using Cylinder Works 642.CW.21001-K01 makes 500cc. *Does not fit fuel injected R or X models.

Engine / Crankshaft Repair we can do it expertly. Send us the defective crankshaft, like also the engine, with our 40-year experience, we examine their damage and make an offer. If no repair order is placed, we will send their parts back postage free.