A friend of mine was riding my quad somehow rolled it on its side. After he picked himself off the ground he managed to shut the quad off. Who knows how long that was?
After picking up the pieces of the broken front rack he managed to start it and ride it back to the cabin. After checking it out myself it seemed to run ok with the exception of low idle. It seemed to sputter and want to die out when I pushed the throttle. If I butterflied the throttle I could get past the "wanting to die out point" and it would run at mid to high rpms. I figured gas got mixed with the oil and wasnt getting burned correctly by the spark plug. I checked the oil and sure enough, it smelled like gas. I changed oil and plug figuring that would solve the problem. But no change in the performance of the machine.
It still sputters in low rps as your trying to get the machine moving. Sometimes it kills out. It seems to start easy enough and idle ok but the low R's are the problem. If I pull the chock out it idles better and allows me to take off and drive normally. Until I slow down and the rpms fall than it wants to die, and sometimes backfires. I checked the plug again and its dry. So the backfiring is a mystery to me. I checked the throttle control, because that loosened in the roll. I wasnt sure how to set it properly,I know its electric and sometimes needs setting but as long as the two contacts are apart in the control it seems to be set right. I'm thinking its something in the carb/chock, but I just dont know. It definately run, and idles better with the chock pulled out one half way or wide open. Any ideas are welcome. It could be something else, I'm not sure if it ran too long on its side, and damaged something inside the engine to make it run bad at low rpms. The machine it a expedition 425. It always ran perfect until "my friend" got on. Thanks

 

Sounds like maybe when your friend layed it over it could have twisted the handle bars around and jerked the throttle cable out of adjustment.This will cause the ETC to become out of adjustment and cause A low idle and backfiring.[img]i/expressions/face-icon-small-shocked.gif[/img]

 

I was thinkin the exact same thing.
But some honda guy will say it is just a Polaris thing and to sell it and get a honda, and that the Recon is faster than the Xpedition.
Hope you get it fixed

 

Check the airbox for oil.I have had mine on its side and that was what my problem was.

 

I forgot to mention that I did check the airbox and there was oil in the bottom of the box, but the filter did seem of. But I wiped out the oil on the bottom of the box and also pulled the airbox drain and let about 1 1/2 inches of oil from it.
Whats the correct proceedure for adjusting the throttle cable, The machine did land on the right hand side and the handlebar is what kept it from going completely over.

 

To adjust the throttle cable follow the cable down from the handle bars ther will be a rubber boot that covers a threaded nut in the cable with threads on one side of it,pull the rubber cover back and turn the jamb nut until there is 1/8 inch play from left to right in the thumb lever while the machine is NOT RUNNING sitting still in netural.This should take care of the ETC switch adjustment,hope this helps.

 

Also, if even one drop of oil got on the air filter, replace it. Getting wet with oil can weaken it, causing it to tear sometime in the future. Don't risk an engine for a filter.
I agree, adjust the throttle cable tension. Samclow described it just right.