Cylinder Works High-Compression Standard Bore Cylinder Kit for Yamaha WR450F / YZ450F / YZ450FX - CW20012K01HC

The Cylinder Works High-Compression Standard Bore Cylinder Kit, part number CW20012K01HC, is a stock-bore top-end rebuild package that pairs a new Cylinder Works cylinder with a high-compression Vertex piston for performance-focused engine builds. It is intended for Yamaha WR450F, YZ450F, and YZ450FX; see the complete vehicle list below.

Features

• Standard-bore cylinder maintains the original engine displacement
• High-compression piston configuration is designed to increase performance without converting to a larger bore
• New cast-aluminum cylinder with an NSC electroplated bore
• Precision diamond-honed cylinder finish supports ring seal and oil retention
• Includes the major cylinder, piston, and gasket components needed for top-end service

What Is Included

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

Specifications

• Brand: Cylinder Works
• Product Type: High-Compression Standard Bore Cylinder Kit
• Bore Configuration: Standard bore
• Piston Configuration: High compression
• Cylinder Construction: Cast aluminum
• Bore Finish: Nickel-silicon-carbide electroplate
• Manufacturer Part Number: CW20012K01HC

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.