update after couple months... the engine started making less and less power and more noise no matter what I did with jetting, filter, and pipes. I ended up rebuilding the engine with an airsal 50cc kit, new seals/bearings and have it running great, 14 bing, 72 jet, circuit pipe, pegging the 30 mph speedo. Also got new seat, pedals, shocks, and fender. (edited)