I've got a '78 KE100 which was sitting in my dad's shed for most of its life. I rode it as a kid and now and trying to get it going again. It runs fine for the first 5 minutes, then stalls out. When I squeeze the fuel line, I see gas I can, but it is not completely full from top to bottom. Not sure if it should be or not.
After I restart it, it will run for a shorter period of time, then stall out again. This repeats over and over. Sometimes when I restart, the engine revs way too high. Idle speed is a little too high too, perhaps unrelated.
I've dumped the fuel tank and checked the screen in the petcock, which is always clean. Seems to be more related to something being hot and impacting flow. It has a new plug as of last winter, and fewer than 20 miles since then.
I had it in the shop last fall, for starting issues, and it worked great afterwards. The dealership does not want to touch anything this old because of scarcity of parts.
Any suggestions of where to start? Does this seem like a float issue?
Thank for any ideas.