Right after I joined this forum yesterday I bundled up for a quick ride. Had a lot of pedaling to get it started, then it acted like it wouldn't warm up, no idle, had to really open the throttle to get it to clean up and it just wouldn't run right unless it was wide open. Rolled back in to tear the carb apart and found the problem, the main jet had fallen out! All things considered, it really ran pretty good. Tossed it back together and all is well.