255, 255);”20001, 4786M09500, 4785M09500, M1011, C3066, C3066-EST, 5TJ-11631-00-00,

20001 4786M09500, 4785M09500, M1011, C3066, C3066-EST, 5TJ-11631-00-00, 5TA-11351-00-00, 5JG-11603-00-00, 8630DA, 8562DA

YZ450F / WR450F Top End Rebuild Kit

Includes:

95mm Stock Bore Nikasil Cylinder (1 year warranty*)

95mm Wossner forged piston kit (includes piston rings, wrist pin, and circlips)

12.5:1 Compression perfect for pump or race gas

Top end gasket kit with MLS head gasket

Perfect for pump gas or race gas

Fits all 2003-2006 WR450F models

1 year warranty on complete kit for your piece of mind*

– The Best Parts. The Best Performance. The Best Price. BRAPPPPPPPPPP!