110cc problem

jonas20 · 08-22-2021, 05:26 PM

Hello, I recently did a engine rebuild from 72cc to 110cc. I changed the crank, cylinder and the cylinder head. It starts up fine and idles decently. When I give it throttle the rpms from 2k to 4k go up smoothly, but after 4k it seems like it doesnt want to rev up. When riding it, it bogs really hard, but then all of a sudden the rpms rise fast and if u change the gears fast and take off the throttle fast it rides good, but if you let off the throttle just a little for too long it starts bogging again, what could cause this? I tried looking for air leaks, found none, carb cleaned, changed spark plug, the fuel flows good from the tank to the carb, also tried another carb.

08-22-2021, 05:26 PM	#1
jonas20 Join Date: Aug 2021 Posts: 2	110cc problem Hello, I recently did a engine rebuild from 72cc to 110cc. I changed the crank, cylinder and the cylinder head. It starts up fine and idles decently. When I give it throttle the rpms from 2k to 4k go up smoothly, but after 4k it seems like it doesnt want to rev up. When riding it, it bogs really hard, but then all of a sudden the rpms rise fast and if u change the gears fast and take off the throttle fast it rides good, but if you let off the throttle just a little for too long it starts bogging again, what could cause this? I tried looking for air leaks, found none, carb cleaned, changed spark plug, the fuel flows good from the tank to the carb, also tried another carb.
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