Cylinder Kit (Big Bore +3mm 478cc) for Yamaha YFZ450R

+3mm making 478cc with 12.0:1 compression piston

Cylinder Works +3mm Big Bore Complete Cylinder Kit for the 2009-present Yamaha YFZ450R and 2010-2011 Yamaha YFZ450X increases displacement to 478cc. This direct bolt-on upgrade requires no re-plating and includes all necessary components for installation, featuring a matched Vertex piston for durability and performance.

Features

• Direct bolt-on installation with no additional machining required
• Nickel Silicon Carbide plated for extended lifespan
• Honed to exact size for easy piston installation
• Big bore cylinders do not require additional machine work (unless specified)
• Includes all necessary components for installation
• Included Items-
• Cylinder
• Piston assembly
• Top-end gasket set
• Specifications

Bore: +3mm
Displacement: 478cc
Uses Vertex Piston #23403

Compatible with:
Yamaha YFZ450R 2009-present