Recently bought a 1991 BB. Everything works great. Only thing is, each time I put it in reverse, it either starts to rev high and start moving without giving it gas or I'll give it a bit of gas and let go and it will still rev at the same rpm or higher and keep moving. Doesn't do it for high or low. Adjusted the carb to idle lower to the point where the bike basically stalls and the problem still occurs. Could it be that it needs a clutch adjustment? I also just ordered a new carb for it and all the fluids have been changed.