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  1. 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...
  2. Polaris 700 Efi 2005 map sensor plug missing

    ATV New Members
    Hello i'm hoping some one can Help me with the wiring and replacement of the map sensor wiring on my 2005 700 efi sportsman. the plug was ripped of by previous owner .. I found all 4 wires 22awg . i have to figure out what color goes to what pin on the bosh map sensor and install a new plug...
  3. 05 sportsman 700 efi backfire and bogging down

    ATV Repair and Maintenance
    Need help I have a 05 sportsman 700 efi, it bogs down at immediate throttle and actually backfires into the intake, idle runs ok need help asap!!!
  4. won't idle

    ATV Repair and Maintenance
    I just bought a 06 700 Sportsman that was not running. The owner said it was having idling issues and had replaced the fuel pump and replaced the carb. It will start with the choke out but if you put the choke in it will backfire and die. If you let it warm up, you can start it in gear and it...
  5. 2004 Sportsman 500 idle problem and backfire

    Polaris Sportsman
    The float valve went bad on my 2004 Sportsman 500 (carbureted). All of the gas in the tank ended up running into the cylinder and down into crankcase. After replacing float valve, I put a small amount of oil into cylinder. I emptied crankcase and ran 3 oil changes through it immediately...
  6. 2001 Polaris Xplorer 250

    ATV Repair and Maintenance
    Hello, I have a 2001 Polaris Xplorer 250 two stroke. I have had starting problems. I got the atv in 2002 and I haven't went through the carbs yet. When starting it takes about 10 to 30 minutes to start and every time I park it, I have to cut the fuel off and run it out of gas, which can take up...
  7. Spitting and backfiring at idle

    Around The Garage
    I bought this 1995 Polaris Xplorer 400 and so far pretty much rebuilt the thing. My current issue is at idle it's sputtering, spitting and a occasional backfire. Anything above idle it runs like a raped ape... I've cleaned the carb (3 times), last using a rebuild kit. I've replaced the plug...
  8. Engine Dying while riding

    ATV Repair and Maintenance
    Hey guys, I know this question has probably been answered 1000 times, but I have had some bad trouble with my machine lately. I have a 2008 Polaris Sportsman 500 EFI, and it has about 1200 miles on it. The last few times I went to take it out, it would idle fine, but when you hit the throttle...
  9. Scrambler 400 intermittent backfire and stall

    ATV Repair and Maintenance
    Hey everyone, I am new to the forum. Just joined after I purchased a '96 Scrambler 400 2-stroke. I runs fine part of the time but will suddenly backfire and stall. At this point I have trouble starting it. It catches and then stalls or it backfires. If I continue trying, I can usually get it...
  10. Polaris Trail Boss backfired, wont idle

    ATV New Members
    Hello, I am new to this but I will try to explain the issues as best as I can. I was recently handed down a 1992 Trail Boss 4x4. It had been stored outside, covered for the last few years and was very neglected. It had an issue of sometimes not starting and always not idling correctly when...
  11. trail boss sputters and backfires

    ATV Repair and Maintenance
    my trail boss 330 is sputtering and backfiring. i just changed the oil, emptied the gas tank, poured in some carb cleaner with brand new high octane gas. no change. it will start but when i push the choke in, it dies. so i try to run in with the choke partially in but whenever i give it gas, it...