i dont know what carb butterflies are. i took the bike somewhat apart today. i got the tank off and realized my friend doesnt have a screw driver to take off the airbox.... but it was the first time i took a look at the bike. i noticed the CDI box had 1 single wire that was cut from the box. i dont know if this is new and if this is the problem, but i have done some research on the cdi and it seems like it can fit. my brother thinks it has to do with the spark plugs.