Ihave a 1980 puch maxi sport mk 2. Wouldn't work, but then I cleaned the carb and got it running! However, it is doggin it up hils and only achieves a speed of 20 mph on a flat. It starts great and seems to run great. One other thing though, is it pulls forward a little bit when just idling. What can I do to make this puppey run perfecto? Help extremely appreciated.