missfire

[pete]

Hi i own a suz 110cc quad an as late its difficult to start and when it does it will stall easy and will only rev half throttle give it any more and it backfires like mad!!!
i have had the carb off and cleaned it.

Any ideas??

Many thanks

[pete]

sorry ment a "sun 110cc"

Doin my nut in all help greatfull