Hi, I'm need of a little help. I have a 1994 gas gas 327cc . The bike starts and then bogs out and dies after about 15 seconds? I noticed it will cold start then warm up a little then die out. It won't start when warmed up. Can anyone help me troubleshoot this bike please? Any info on this bike would be great I just got it and no nothing about it. I am brand New to trials.