I have put a 21mm carb on my 70cc stage 6 cylinder... I have a 102 mm jet in it as it would hardly move with the 92 jet on...it goes fine for a while but if I full throttle it for a few seconds it will start bogging and I have to let the throttle off and if I give it throttle again it will big then suddenly go flying and do the same over again till it stops completely , takes ages to kick over.and helps if I take the petrol cap off and put it back on :/ what should I do? Thanks
right , if i go about 30 it will not stop , i think the carb is not filling properly , how do i make the fuel flow through faster? i have the tap on the tank and its open fully