HOT RODS Cylinder Rebuild Kit - Big Bore For YAMAHA WR450F, YZ450F H-23001-K02

Big Bore Cylinder Kit YAM WR450F 03-06 YZ450F 03-05 (+3mm) makes 478cc Std Uses Piston V-23404. Includes (Cylinder, Piston, Rings, Pin, Clips, Gaskets)

+3mm Big Bore Cylinder Kit. 478cc. 12.5:1 Comp. 98mm. Includes (Cylinder, Piston Kit, & Top-End Gasket Kit). Uses Vertex #23404.