Changed the oil, reset the idle mixture screws and idle adjustment and she snapped right back to life! My son had come home in late May and was really jonesing to ride "his" bike. We've made several trips to a local parking lot, got him out on a couple back roads with no traffic and he seems to be catching on quick. Having a blast he said.
Funny how most kids today have no concept of a manual transmission. He's never had the opportunity to learn like I did back in the day. Clutching, shifting, rpms and throttle control. All new to him. But he's getting it. Just be smooth and take it slow I repeatedly tell him.
Also signed him up for a riding course 'cause you know, Dad doesn't know anything. I figure let someone else teach him some pointers and show him some tips. Maybe he'll learn something new.