The +3mm Big Bore Complete Cylinder Kit for the 2004–2013 Yamaha YFZ 450 ATV provides a direct bolt-on upgrade, delivering increased displacement without requiring additional machining. Designed to maintain a near-identical appearance to OEM components, this kit is engineered for durability and precision with Nickel Silicon Carbide plating and exact honing for effortless piston installation. It includes all necessary components for a seamless installation.

Features

• Direct bolt-on design; no replating required.


• Nickel Silicon Carbide plating ensures long cylinder life.


• Honed to precise dimensions for easy piston installation.


• Big bore upgrade requires no machining unless specified.


• Complete kit includes all necessary components for installation.

Included Items

• Big bore cylinder (+3mm)


• Piston


• Ring set


• Two circlips


• Gasket set


• Piston pin

Specifications

• Displacement: 468cc for 2004–2005 models; 478cc for 2006–2012 models


• Compression: Standard


• Compatible Piston: Vertex #23403

Vehicle Compatibility

• Yamaha YFZ450 (2004–2013)


• Yamaha YFZ450BB Bill Ballance Edition (2006, 2007)


• Yamaha YFZ450LE Limited Edition (2004)


• Yamaha YFZ450SE Special Edition (2005, 2007)


• Yamaha YFZ450SE2 Special Edition 2 (2007)


• Yamaha YFZ450SP 50th Anniversary Edition (2006)


• Yamaha YFZ450SP Special Edition (2008)


• Yamaha YFZ450SP2 Special Edition 2 (2008)