CYLINDER KIT 03-05 YZF450 98, WORKS CYLINDER 23001-K02, WRF450 03-06

The +3mm Big Bore Complete Cylinder Works Kit increases engine displacement to 478cc for Yamaha WR450F and YZ450F models. This direct bolt-on kit requires no replating or additional machining, offering a ready-to-install solution with OEM-like performance and quality.

Features:

• Increases displacement to 478cc with a +3mm big bore cylinder.
• Direct bolt-on replacement with no additional machining required.
• Nickel Silicon Carbide plated for durability and long life.
• Precisely honed for straightforward piston installation.
• Complete kit includes all necessary components for installation.

Included Components:

• Cylinder
• Piston
• Gasket set
• Piston pin
• Circlips (2)
• Ring set

Specifications:

• Displacement: 478cc
• Compression: Standard
• Piston type: Vertex #23404

Vehicle Fitments:

• Yamaha WR450F: 2003–2006
• Yamaha YZ450F: 2003–2005

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex