A forged piston kit designed as a standard bore replacement with a nominal diameter of 97.00 mm (actual 96.95 mm) and a 12.5:1 compression ratio. It utilises surface treatments to manage heat and friction and is supplied complete with rings, wrist pin and circlips.

Features

• Forged aluminium construction for strength and durability


• Hard-anodised dome to increase heat resistance and reduce carbon build-up


• Machined smooth crown to reflect combustion heat and minimise deposits


• MOS2 (Teflon/Molybdenum) coated skirts to reduce friction and aid break-in


• 100% CNC-machined dome for precise geometry


• Kit includes piston, piston ring set, wrist pin and circlips

Specifications

• Bore size: 96.95 mm (standard bore; nominal 97.00 mm)


• Compression ratio: 12.5:1


• Piston type: Forged


• Available sizes: Standard (FX-40049), +0.01 mm (FX-40049-B), +0.02 mm (FX-40049-C)

Vehicle Fitments

• Yamaha YZ450F 2014–2017 (Standard 96.95 mm)


• Yamaha YZ450F 2018–2019 (Standard 96.95 mm)


• Yamaha YZ450FX 2016–2020 (Standard 96.95 mm)


• Yamaha WR450F 2016–2020 (Standard 96.95 mm)