CYLINDER KIT BIG BORE 2009-2018 YAMAHA YFZ450R WORKS CYLINDER 21003-K02
Cylinder Works +3mm Big Bore Complete Cylinder Kit increases displacement to 478cc. This direct bolt-on kit requires no re-plating and includes all necessary components for installation, featuring a matched Vertex piston for durability and performance. Features include direct bolt-on installation with no additional machining required, Nickel Silicon Carbide plating for extended lifespan, and honing to exact size for easy piston installation. Big bore cylinders do not require additional machine work unless specified. Includes cylinder, piston assembly, and top-end gasket set. Bore is +3mm and displacement is 478cc. Uses Vertex Piston #23403. Cross-references YAMAHA OEM Part Number 2S2-11311-10-00.
- SKU
- 56-K172.98.CKW
- Brand
- Cylinder Works
- Availability
- In Stock (1)
FULL DESCRIPTION
Cylinder Works Big Bore Cylinder Kit for Yamaha YFZ450R/X
Upgrade your Yamaha YFZ450R or YFZ450X with this complete Big Bore Cylinder Kit from Cylinder Works. This kit increases the engine displacement to 478cc for enhanced power and performance. Designed as a direct bolt-on, it requires no re-plating or additional machining, simplifying the installation process.
Key Features:
- Increases displacement to 478cc for greater power output.
- Direct bolt-on installation requires no additional machining.
- Nickel Silicon Carbide plated cylinder for superior durability and extended lifespan.
- Honed to precise dimensions for effortless piston installation.
- Includes a matched Vertex piston for optimal performance and reliability.
- No re-plating necessary, saving time and effort.
Included Components:
- Cylinder
- Piston assembly (Vertex Piston #23403)
- Top-end gasket set
Specifications:
- Bore Size: +3mm
- Total Displacement: 478cc


