I just purchased a 1994 DR650 with 7000 on it. The bike is in very good shape but as I ride it there is a bad vibration that increases and decreases with the gas. As the bike has been sitting for a couple of years, I tried to blow it out but that only creates greater rumble and no power. Just as I am ready to pack it in, the problem seems to go away and the bike runs smooth and good for a few blocks and then the growl returns (it rattels my teath). This happens each time I test it.(UP DATE) When in nutral the bike walks back wards under power, I can stop it by grabing the chain (BARLEY) the chain is defently being driven in reverse. I am thinkin clutch whats your oppinion?