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rough running

  1. 2011 Polaris Sportsman 550 EFI Rough Idle.

    Polaris Sportsman
    Hoping you guys could help. I have a 2011 Polaris sportsman 550 EFI with 300hrs on it. It is running rough and skipping at idle (when I can get it to idle) it sometimes looses power and dies on me while riding also. I have gotten codes 520193-7 and 168-3 but they are not showing up currently. I...
  2. Help Needed: 2007 Sportsman 500x2 EFI - Engine Electronics

    Polaris Sportsman
    I am pretty sure I have a problem with the EFI electronics system. The machine has 302.8 hours on it. The engine starts and runs fine until it is warmed up - approx. 15 mins. After about 15 minutes of run time, the engine looses power, runs rough, fires back thru the throttle body, backfires...
  3. Xplorer 400 idles rough and chokes

    ATV Repair and Maintenance
    it was running great when I last parked it in may.. it now starts but has a very rough idle and chokes when throttle is open it seems to be running rich as the plug is oil fouled. ive done my research on the board and have found that its probably the carb clogged up because of old gas. what ive...
  4. 2007 sportsman 90 studders past idle

    ATV Repair and Maintenance
    This bike has been sitting up for years. as far as I can tell it's a 2007 sportsman 90 4 stroke I went through the fuel system including the carb. cranks fine, rough idle but I can't tune it due to that fact that it won't power up past an idle. It acts like the rev limiter is out of whack...