Vhm Cyl. Head Yamaha Yz85 `19-25

The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It's manufactured from a high quality alloy and O-rings are used for the sealing. Use VHM standard insert: AE32286-E (for OEM piston) AE32286-029 (for 12° VHM piston APYZ08521757) Use the insert chart as a general guideline to select the insert depending on the fuel, track and elevation. More engine power Better heat transference More resistance to detonation Exchangeable combustion chambers available Inserts must be ordered seperately.