had the same problem...the jets seemed to be clogged...the carb is really easy to take off the fourwheeler...take it off and dissassemble it....take out the jets and air screw(remember to bottom out the airscrew first remember how many turns it took) then take the airscrew out...once all the jets are out clean the entire carb with carb cleaner...once you cleaned it out it also might be a good idea to blow compressed air through the whole thing..including the jets...then all you have to do is reassemble it and put it back on the fourwheeler...this should solve your problem