Cylinder Works +2mm Big Bore 99mm Cylinder Kit for the 2014-2017 Yamaha YZ450F, 2016-2018 Yamaha WR450F, and 2016-2018 Yamaha YZ450FX increases displacement to 468cc. This direct bolt-on upgrade requires no re-plating and includes a matched Vertex piston for durability, performance, and reduced engine noise.

Features

• Direct bolt-on installation with no additional machining required


• Nickel Silicon Carbide plated for extended lifespan


• Three options available: Standard Bore, Standard Bore High Compression, and Big Bore


• Includes cylinder, piston, rings, pin, clips, and top-end gasket kit


• Big bore cylinder kits do not require additional machine work (unless specified)


• Replacement Vertex piston, rings, clips, and pins available separately


• Manufactured in the U.S.A.

Specifications

• Bore: 99mm (+2mm)


• Displacement: 468cc


• Compression Ratio: 12.5:1


• Uses Vertex Piston #23655

Cross-Reference OEM Part Numbers

• Not specified

Vehicle Fitments

• 2014 Yamaha YZ450F


• 2015 Yamaha YZ450F


• 2016 Yamaha YZ450F


• 2017 Yamaha YZ450F


• 2016 Yamaha WR450F


• 2017 Yamaha WR450F


• 2018 Yamaha WR450F


• 2016 Yamaha YZ450FX


• 2017 Yamaha YZ450FX


• 2018 Yamaha YZ450FX