I bought a 99 kx 125 that needed a top end rebuild. So I did a top end rebuild and put other things in like power band, gaskets, impeller, propeller and etc. When I put it back together I started it up and it had compression, gas was flowing throughout the bike also. I rode it into 4th and 5th gear which felt the same as 3rd gear. When I rode it back I tried kicking it and it had no compression. So now im back where I started and need a top end rebuild, what else do I need to fix so it is back to normal? I also had another problem that might be relevant, when I started the bike and put it in first It would stall out like I never pulled the clutch in, which I was. Can anyone tell me what I need to fix?