I have a 200cc atv and i have been having problems with the idleing on it. It will idle at a normal rpm for i little bit then it will rev high for 7 or10 seconds then go back down to a normal idle,it keeps reving high then goes back to normal, I tried to adjust the screw on the side of the carb but it did'nt help.Can any of you out there help me out.....thanx [img]i/expressions/face-icon-small-confused.gif[/img]

 

What kind of atv is it?

 

My quad is a X-RAGE 200-w here is the web site address ( http://www.x-rage.ca/Atvs.html )

 

Sounds like an air leak.
Spray WD-40 around the intake tubing/carb and see if the idle speed changes.