DA31153

When using another exhaust pipe, it will influence the opening of the power valve. With the VHM power valve adjuster with 2 stage spring, you are able to adjust the opening timing of the power valve easily with the screw. The first stage of the spring allows the power valve to open very easily for a better and more direct response. The second part of the spring keeps the power valve fully open for maximum exhaust flow. The VHM power valve adjuster is made from high-quality aluminium.

• Easily adjust the opening timing

The VHM power valve adjuster fits the VHM cylinder head (AA33112), VHM power valve base (DA31181) as well as the OEM cylinder head and power valve base.