Cylinder Works +3mm Big Bore Complete Cylinder Kit for the 2009-2018 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

Cross-Reference OEM Part Numbers

• YAMAHA: 2S2-11311-10-00

Vehicle Fitments

• 2009 Yamaha YFZ450R


• 2010 Yamaha YFZ450R


• 2011 Yamaha YFZ450R


• 2012 Yamaha YFZ450R


• 2013 Yamaha YFZ450R


• 2014 Yamaha YFZ450R


• 2015 Yamaha YFZ450R


• 2016 Yamaha YFZ450R


• 2017 Yamaha YFZ450R


• 2018 Yamaha YFZ450R


• 2009 Yamaha YFZ450RSE Special Edition


• 2010 Yamaha YFZ450RSE Special Edition


• 2011 Yamaha YFZ450RSE Special Edition


• 2012 Yamaha YFZ450RSE Special Edition


• 2013 Yamaha YFZ450RSE Special Edition


• 2014 Yamaha YFZ450RSE Special Edition


• 2015 Yamaha YFZ450RSE Special Edition


• 2016 Yamaha YFZ450RSE Special Edition


• 2017 Yamaha YFZ450RSE Special Edition


• 2018 Yamaha YFZ450RSE Special Edition


• 2010 Yamaha YFZ450X


• 2011 Yamaha YFZ450X


• 2010 Yamaha YFZ450XBB Bill Balance Edition


• 2011 Yamaha YFZ450X SE