Join Date: Mar 2006
Thanked 0 Times in 0 Posts
Re: 1979 kx80 wont run right
Sounds like some kind of fuel delivery issue to me- like maybe leaning out and dying? I don't know much about the old KX80s. Reed valve problem perhaps? I don't think they did any of those exotic power valve exhaust sytems in those days...
You might try locating a shop manual and looking if it has a troubleshooting section. It might give you some more basics to look at.
Also, you said that you put in a new spark plug. You might get some clues if you pull it out and look at it- the color of the insulator can tell you a lot about how your bike is running. Also, keep a close eye on things like what the exhaust is doing when it dies. Does it smoke really blue (loading up), or is it putting out almost no smoke at all? A good running 2 stroke should give just a bit of blue under acceleartion, but shouldn't necesarily smoke like a bee-killer. [img]/ubbthreads/images/graemlins/smile.gif[/img]
Anyway I don't know much about those sorts of bikes, but that is what I would kind of do- look for symptoms and try to track them down. You may also try a compression test to be safe...