Wen i start my 110cc pit bike it revs loads with out me doing anything and when i change choak or rev the throttle it cuts out have been told its the carb

pull cover on magneto and check for loose pickup coil.

Could be a carbon track on the distributor cap if it has one.

hey mate could be a few things, dirt in the jet easy fix take petrol float off the carb clean jet with w..d. Or there are two screws on the carb one petrol and one air mix the one u want his the petrol one. this will be very close to the accelerator cable and will have a spring on it turn it clockwise. VERY SMALL MOVEMENTS u will hear the engine rev faster as u turn the screw. hope this helps ****

check for bad spark plug.has it got spark?also ckeck the carb for contaminated fuel and blocked jets in carb

to much air mybe

it has a centrifugal clutch
its spring loaded shoes engage the drum when the engine revs are increased !
Cheers Rob

sounds like your carb could be blocked with dirt if it wont start unless you put juice down plug i would take the carb off and give it a good clean and also make sure the jets ok just clean them with carb cleaner and a paper clip

it mite b something to do with your coil pack change it n c if it works

play around with the throttle adjustments

my pit bike will not keep it revs for a long time so can some one help me it is my first pit bike