I purchased this bike Sunday and it needs some tlc. It's punched 50 over stock and at half throttle it wants to bog down bad. The carb and jets are stock. Does this mean that it need more fuel and jetting. Also the mating surfaces between the header and exhaust flange leaks a little. I'm going to get the 86 carb and put on it but I'm wondering what is causing this with the stock carb. Any ideas.