Does anyone have an unorthodox underdrive pulley fitted? I have been reading about the crankshaft vibration that is associated with lightweight underdrive pulley due to the lack of damping. Does this destroy engines/has anyone with one ever had any problems?
These claim a serious power gain for just a pulley on the TT, some figures as high as 37bhp! If that is true, im a little bit sceptical about that, why doesnt everybody have them?