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idle issues

  1. Polaris 550 (2009) starts fine but won't idle

    Polaris Sportsman
    I've checked everything so far, including new EFI module, new throttle body, new spark plug, new intake gasket, adjusting valve lash, checked compression (~100 psi) and so far no luck. The engine starts find and idles great at ~1800 rpm for about 30 seconds then starts to slow down as it warms...
  2. Idle screw adjustment & Mixture screw adjustment

    ATV Repair and Maintenance
    Hey everyone I'm not very mechanically inclined and need some help. I've found the very obvious idle screw but I don't know where the fuel mixture screw is. My polaris magnum 325 idles poorly (very slow and dies sometimes) and it has been back firing a lot and smelling like gas. Is the mixture...
  3. Unable to Adjust Idle With Throttle Stop Screw Polaris Xplorer 400L

    ATV Repair and Maintenance
    I have a 400L that I rebuilt, was attempting to adjust the idle with the large throttle stop screw. It does absolutely nothing. Looking at the throttle valve (aka throttle slide) I noticed there was an indentation in it where it appears someone really cranked the adjustment screw up against it...
  4. 05 Sportsman 700 EFI--Rough Idle

    ATV Repair and Maintenance
    Hey guys, new to the forum and a new Polaris owner. I just bought this 05 Sportsman 700 EFI. I'm having some issues with the idle running very rough. It constantly backfires from the air intake. Sounds almost like popcorn. Any help would be greatly appreciated. Currently I have a can of Sea Foam...
  5. idle issues

    ATV General Discussion
    Im new to the page and I recently rolled my Polaris sportsman. from what I can see as far as damage is that there is some minor plastic damage, the handle bar is slightly bent on one side and I tore the boot on the front cvt shaft. but the idle issue is what im not sure about. ive adjusted the...
  6. Odd Carb Problem

    ATV Repair and Maintenance
    I rebuilt the carb on my 2004 ATP. I replaced the float, needle valve and O-ring. Now I have an odd problem. It starts easily, when cold or hot. When starting cold, it will idle at about 1600 rpm for about a minute and then it starts to rev up! It will continue to rev to about 5000 rpm. I...
  7. Sportsman 500 won't idle with choke off

    ATV New Members
    I recently bought a 2000 Polaris Sportsman 500. They just put a new 500 HO motor in it and took it out a few times before it sat for a year or two. I have cleaned the air filter, replaced fuel pump, took carb apart except for the two jets that screw in, and soaked parts in carb cleaner for 6...
  8. 2011 850xp idle issues

    ATV Repair and Maintenance
    I've got a 2011 sportsman 850xp. When I first got it it idled between 1150-1200 rpms cold and when it warmed up. I replaced stock exhaust with hmf swamp xl. Also put 28" tires on. That's all I've done to it. I've put about 35 hours on it since I've made the upgrades. I've changed the oil and oil...
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