Notice a interesting thing while out for an evening rip tonight. At exactly 5 K RPM ( any gear)my accelerator pedal develops a mild vibration, quickly disappearing after 5 K. On the bright side I know by the tickle in my heavy right foot when I'm at 5 K and a second later to shift the 5 sp. On the down side??? What the heck is it???? I'd like to think it some tricky German engineered 5 K rpm vibration indication so you don't have to watch the Tach.....but the pessimist in me....