re: Motorized Bicycle Take a Tip...Leave a Tip
Check for air leak between carb and cylinder, or restricted gas flow. Should be one or the other. An 'o' ring where the intake tube joins into the carb heps seal it, make sure its is big enough to be snug in the carb and won't get sucked into the intake tube. Tighten the clamp tight. If gas flows easily/fully to carb, check for dirt in bowl or float not swinging smooth. Other more exotic possibilities, but try those first!