I have 110cc and 125cc hensim four wheelers. When parked last fall they both ran great. Now not so much. I cleaned the carbs and replaced the spark plugs and still no luck. they will start and idle but bog and stall if i give throttle. Help??

 

HOW did you clean the carbs? did you remove the jets? if not, therein lies your problem. a fuel delivery issue. it's been my experience 99.9% of the time when a quad bogs down, the main jet is partially plugged/clogged. remove the jet, clean all orifices. you should see daylight through everything and down the center of the jet. that'll fix you up.