yes i have a quad master 500 and it will not idle with choke off any ideas

 

well the first thing i would do is change the plug, clean the carb, and air filter sorry thats not much help but just a couple of ideas... Have you tried turning your ideal up alittle bit? maybe its just idealing to low... good luck buddy

 

i recomend the same thing, a good carb cleaning and try and mess with the idol speed. idk much about your specific type of ATV, but kinda sounds like your low end (pilot) in your carb might be gunked up and not allowing enough fuel to mix at idol. Will it just not idol? or can you ride it around with no other problem?

hope this helps some

 

yeah once i throttle up and get to moving it runs just fine when let off the throttle and comes back to idle it stalls

 

thanks for the tips i try that

 

is there any backfireing if you throttel up then let of the gass?

 

yes it does backfire when throttled up and let off

 

also try cleaning you spark arrester if it has one... check you fuel lines to make sure there no pin holes or somthing that might be letting air in where its not supposed to be... that happened to a friend of mine

 

bigboss6920 is right, check for air leaks into the engine, spray a carb cleaner around the the carb and fittings while holding the throttel at a steady rate, since it wont idol. if the engine rpms increase noticeably then you may have an air leak.

but it may also be that your pilot jet is all gunked up and it not letting any fuel mix at idol. if possible, try and remove the pilot jet and clean it up along with the carb

 

This is one I can even help on I think! Maybe... Turn your idle (fuel/air) mixture screw clockwise a quarter inch at a time until you can idle properly. I am almost sure this is your problem. Sometimes when valves get gunked up (intake valve especially) it may be necessary to turn your idle screw back counter - clockwise to get her to fire. I have definately found this to be true for me. Good luck!! Let us know how you make out.