I just finished installing a C clutch with a shift kit and everything is working fine. But it is extremely hard to turn the engine over. I have to stand and jump on the pedal to even get it turning and even then the clutch slips after half a turn. I don't even have the carb or exhaust attached yet so I'd think it would be extremely easy to turn. Is this normal? I'm thinking about just getting a pull start if it is. Thanks for any help.