Cylinder Works Standard Bore Cylinder Kit for Yamaha WR450F / YZ450F / YZ450FX - CW20012K01

The Cylinder Works Standard Bore Cylinder Kit, part number CW20012K01, is a complete stock-bore top-end rebuild package built around a new cast-aluminum Cylinder Works cylinder. It is intended for Yamaha WR450F, YZ450F, and YZ450FX; see the complete vehicle list below.

Features

• Standard-bore configuration maintains the engine’s original displacement
• New cast-aluminum cylinder with an NSC electroplated bore
• Precision diamond-honed cylinder finish supports ring seal and oil retention
• Matched Vertex piston kit provides the piston components required for the application
• Top-end gasket set supports cylinder and head removal during rebuild service

What Is Included

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

Specifications

• Brand: Cylinder Works
• Product Type: Standard Bore Cylinder Kit
• Bore Configuration: Standard bore
• Cylinder Construction: Cast aluminum
• Bore Finish: Nickel-silicon-carbide electroplate
• Manufacturer Part Number: CW20012K01

Vehicle Fitment

Make: Yamaha

• WR 450 F (2019-2020)
• YZ 450 F (2018-2019)
• YZ 450 FX (2019-2020)

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.