Cylinder Works Standard Bore Cylinder Kit for Yamaha YFZ450 / YFZ450R / YFZ450R SE & More - 20003-K02

The Cylinder Works Standard Bore Cylinder Kit, part number 20003-K02, is a complete stock-bore top-end rebuild package built around a new cast-aluminum Cylinder Works cylinder. It is intended for Yamaha YFZ450, YFZ450R, and YFZ450R SE; 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: 20003-K02

Vehicle Fitment

Make: Yamaha

• YFZ 450 (2017)
• YFZ 450 R (2009-2023)
• YFZ 450 R SE (2009-2023)
• YFZ 450 X (2010-2011)
• YFZ 450 X Bill Balance Edition (2010)

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.