Clutch has no resistance , jumps stalls when putting in gear

Pull the clutch lever in and see if there is any resistance. If it has little or no resistance at the lever, it has air in the line(if hydraulic) or the clutch cable needs adjustment. The clutches are probably not fully disengaging (dragging)which could be why it turns off when placed in gear.

clutch is worn , or seized

The clutch plates are probably rusted. I ride the bike with the clutch lever pulled in until very warmed up and keep blipping the throttle at low speeds in first gear this sometimes releases the stuck clutch.

Clutches may be sticking from sitting. put into high gear and push to try and loosen. If not, you may need to open up the clutches and separate them.

The PW80 does not have a manual hand lever clutch, its a 3 speed semi auto. The bike will jerk and shut off when put in gear. If I put it in gear while rolling then it will work. Any ideas?

with the engine off put it in gear pull in the clutch if you can't move the bike the clutch is dragging and needs adjusting

It sounds to me like a part is missing in the clutch assembly. Bear in mind that the first plate installed in the clutch assembly is a cork friction plate, then metal, cork, metal, ect.. You should end up with a cork friction plate. There should be 6 metal plates and 7 cork friction plates. The diagram below is a tri-z 250. Please rate my answer. Thanks!

First of all if the bike sat for years the plates may just be stuck together. Disassemble and inspect the clutch. For racing some clutches are all aluminum plates. To last longer two or three plates may be metal. Some people put in all metal because they do not race and that set up will last longer. Aluminum plates are soft for better clutch grab. Aluminum plates tend to wear out faster than the the friction plates. So when you inspect the plates figure on replacing all the aluminum's , your friction's and metal's are probably fine.

conducation in the clutch cable. Hope that helps you out

this may help,it doesnt sound like the clutch is out of adjustment,it sounds like the clutch plates have become stuck together,(this happens quite a bit if the bike has been parked for a while..ie over winter)..to fix it get the bike moving,down a drive way or something..then just bang it into gear,then shift into the highest gear you can by shifting without the clutch,once you have a bit of pace on simply hold the clutch lever in and work the throttle on and off all the while holding the clutch lever in,the clutch should free itself fairly quickly and should be back to normall,a lot of older bikes are good at doing this..hope this helps