Just picked up a 76 Puch Maxi. Starts for about two seconds then dies right away. I think it is a fuel issue. Any ideas? Fires RIGHT up with starter fluid, then dies shortly after. I feel like it is choking it self out. When I hit the throttle, the choke knob moves up. Is this supposed to happen? Also, what position is choke on or off? And how to I open the bottom of the BING carb to clean the float? Cleaned everything else on it, but have no idea how to open the bottom end of the carb. ANY help would be great. Thanks!!