Cylinder Works Big Bore Cylinder Kit for Yamaha WR450F / YZ450F / YZ450FX - CW21014K01

The Cylinder Works Big Bore Cylinder Kit, part number CW21014K01, is a complete displacement-increasing top-end package with a new Cylinder Works big-bore cylinder and matched engine components. It is intended for Yamaha WR450F, YZ450F, and YZ450FX; see the complete vehicle list below.

Features

• Big-bore configuration increases engine displacement and performance potential
• New cast-aluminum cylinder with a nickel-silicon-carbide electroplated bore
• Precision diamond-honed cylinder finish supports ring seal and oil retention
• Matched Vertex big-bore piston kit is selected for the cylinder and application
• Top-end gasket set provides the required sealing components for installation

What Is Included

• Cylinder Works big-bore cylinder
• Matched Vertex big-bore piston kit
• Top-end gasket kit with required gaskets and O-rings

Specifications

• Brand: Cylinder Works
• Product Type: Big Bore Cylinder Kit
• Bore Configuration: Big bore
• Cylinder Construction: Cast aluminum
• Bore Finish: Nickel-silicon-carbide electroplate
• Manufacturer Part Number: CW21014K01

Vehicle Fitment

Make: Yamaha

• WR 450 F (2021-2023)
• YZ 450 F (2020-2022)
• YZ 450 FX (2021-2023)

Fitment and Installation Note: Confirm the complete year, make, model, engine configuration, and manufacturer part number before ordering. Engine assembly should follow the vehicle manufacturer’s specifications, clearances, torque values, and break-in procedures.