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Ships within 48 hours · Estimated delivery Sep 26 - Oct 1
All ProX Piston Kits are supplied complete with Piston Rings
Yamaha YZ250 1999-2022
Don’t take a chance of a derailment or locked up rear wheel get your WEDGE today
Wider reed cage for maximum airflow
some new 65SX engines have bore Ø45
VHM insert Yamaha YZ125 2005 - 2021 / Fantic XX125 2021 (11.40cc) AE32100-266 520SX All ProX Piston Kits areThis insert has a higher volume lower compression ratio than our VHM standard insert, meaning better overrevolution characteristics and more top speed. However, keep in mind that this compromises bottom power reaction. The combustion chamber fits the VHM cylinder head perfectly and is easy to change. The last numbers of the part number are engraved to the insert for identification. Use in combination with VHM head AA33077 More top Best for hard ground