Today I was riding my bike on the track and I was on the gas and it started gradually loosing power for about 3 seconds. At first I thought I was just out of gas but after I put gas in I tried to crank it but it would start. So I decided to try and roll start it, still nothing. At the bottom of the hill I tried starting it but the kick start wouldn't even budge.it was like it was almost locked up. By brother went down there and got on it and the kickstart did go down but had no compression at all. But maybe every once in a while it will have a little compression but never start. But it is mainly like locked up, then it feels like no compression. Maybe a piston wrist pin slipped? Crank cracked? Valves badly messed up not allowing air in? Suggestions please. It WOULD NOT start. Sorry.