Hey Bryanb, thats exactly what mine sounds like....runs fine until about 20 or so then sounds like its just flooding out or something. Everyonce and a while it 'catches' and I cruise at like 30mph and then it drops back down to 20 in a few seconds.
I haven't found the time to do the draino thing and I'm beginning to think maybe the carb just needs tweaked or something. It sounds like other people are having our same damn problem. Anyone who fixes this prob., pls post. thanks