Hello Let me give you some back round on this atv. First off it was free and not running. Had low compression and sat for 1.5 years. I got it to run but very rough.I rebuilt the top end bored .20.and valve job.Bought a carb. rebuild kit.It starts when i hold in the throttle and idles fine for a few seconds then revs up and shuts off. I cant seem to keep it idling. It seems like its not getting enough fuel then all the sudden it gets too much then shuts off.The pilot jet is set at 2 5/8 turns.Am i missing something.Any suggestions or help will be appreciated. Thanks Mike

 

The PMS screw is 2 5/8 turns out. So have you checked the float height? I think it's supposed to be around 17 mm. Unplug the fuel hose from the carburetor and let it run into a clean glass jar. Make sure you have a healthy flow. Also, I know Arctic Cat used Suzuki motors, but maybe more, so, on the 2 Arctic Cat gas models that I have had, you have to switch to reserve well before you would expect, so if you have a reserve switch, try the gas flow in reserve mode too. If all jets are clean and have air blown thru, float height is good, first thing I would try, turn in PMS screw until 1 turn out. Try to get it to idle perfect before tuning for midrange and full throttle. When in doubt, a Dynojet Stage 1 kit may make it easier to tune.

 

Sorry for delay i just got back from vacation. Come to find out i have no compression. Maybe i broke a ring when putting it back together. Or the jack *** at the machine shop hosed me on the work. Any way im going to take it back apart and hope for broken rings. I checked compression it waz at 100. Squirt some oil in the cylinder and it was almost 200. Rings???? What are your thoughts? Thanks

 

Took it apart and i dont see broken rings?There was oil on top of the piston after i removed the head.Could it be a bad head gasket? Should i have used some sealer when doing the head gasket?Thanks