So here's an update. Believe it or not, I'm making progress, I started checking into the no power/bogging issue with the simple checks. Cleaned the air filter, checked the spark plug, checked the valve clearance. Exh were a little loose, Int were TIGHT. I adjusted the valves and wow, what a difference. It revs up nice and clean, it will actually hit the rev limiter now. Dropped it in gear, it moves, actually moves pretty good, esp, d1, d2, R all work, however after riding it for a few minutes it went into a neutral state and was making a whirling noise. Let it idle til noise stopped, hit the throttle and away it went. This repeated several more times. I'm guessing it's the sprague bearing????
The previous owner wasn't much for maintenance. Could dirty, overdue for an oil change have an effect on the sprague??