Honda Odyssey and Pilot Forum

I'm not super familiar with the Odysseys and Pilots, so forgive me. I have a 1981 Honda FL250 in my shop and I have it to the point where it starts and runs great if it's been sitting for a while. But if I take it out and ride it then shut it off, it refuses to start. Seems to only happen after it has been running for a bit. It's acting like it's getting too much fuel. Choking it does not help. I'd appreciate any advice. Thanks.