In the interest of not annoying the hell out of Jim, I thought I'd post this here.

I just bought a 2000 yz80. It was not running when I bought it.
Back story:

The kid I got it from said the kickstart was jammed and the clutch wasn't working. He said his friend installed new clutch plates and it hasn't worked since.

I took the bike apart and cleaned it up. Cleaned out the carb and rejetted it. Cleaned the airbox and all of that. New plug etc. Took the clutch cover off and fixed the kickstart and also took the clutch plates off and re-installed those correctly.

Clutch still doesn't seem to work. If you pull the clutch, the pressure plate moves out and it seems to function but if you put the bike in gear and roll it with the clutch in it acts like no clutch at all.

I put the bike back together so I could see it run. I put fresh gas in and I take it out and to start it. It won't start. As I'm kicking it, if I open the throttle the tone gets deeper and if I hold the throttle open for a few kicks it makes a loud sound like a psssssh. I know great descriptor.

Anyway I have no idea why it won't start or what the hell that sound means.

As always, your help/suggestions is appreciated.