Product information "VHM EXHAUST CONTROL ADJUSTABLE SX65 WITH SPRING"
Ideal when using a different exhaust system. With this adjustable exhaust control they can gain power over the entire speed band. With the 2-stage spring, you can easily adjust the opening time of the Powervalve with the screw. The first stage of the spring allows the Powervalve to open very easily for better throttle response. The second part of the spring keeps the Powervalve fully open to get the maximum exhaust flow. The VHM Powervalve plates are made of high quality aluminum.
Adjusting the opening timing is very simple
The VHM Powervalve plates fit VHM cylinder head (AA33112), VHM Powervalve base (DA31181) as well as the OEM cylinder head and Powervalve base.
