Changing throttle handle's friction plate

This is an old throttle mechanics but it's almost similar to the Jabo console throttle handle. The new handles have a normal bolt so you can loosen it with a 7 mm spanner before replacing. Then tighten the bolt to fit. The friction plate of the RPM handle can also be replaced in the same way.
We are now experimenting (with GVL = Vitaly) on some other material such as plastic, cork or balsa to replace that poor quality felt. We will send all our customers new parts once we have tested what works best.