Cylinder Works 19-20 Yamaha WR 450 F 450cc Standard Bore High Comp Cylinder Kit 13.8:1 Comp 97mm

OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.

• Nickel silicon carbide (NSC) electroplate bore which allows for tighter tolerances, lower friction and extreme durability
• Precision diamoned honed to exact dimensions and proper surface finish to ensure ring seal and oil retention