Hi all i am stumped with this problem and about to give up..My accelerator pedal does a fine vibration on most roads..When the road gets rougher it seems to vibrate more making me think control arm bushings but i did the Way Mororworks poly urethane bushings so that is not it..I have new Konis all around and the strut tops are fine and not mushrooming so i tried replacing the acc pedal unit itself and that did not do it....Now i am thinking motor mount bushings which is around 500...What is behind that pedal that could make all that vibration..I have a 03 R50 with the CVT trans...If you are the one who solves this i will send you $50.00 OK...Thanks Dan