Hellp please I have a FZR 1000 exup 1989 23k miles that has developed a rotational knocking noise which becomes apparent only under accelleration The knock becomes quicker and slightley louder with the engine speed as aposed to the road wheel speed and sounds to be cumming from the gearbox The knock can allso be felt through the bike Would anyone have any idears or suggestions Thanx for your time and input