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  1. Polaris 500 ho touring EFI bogging out/back fire issues

    Polaris ATV How-Tos
    When starting out riding the ATV runs fine. But once the machine starts to heat up its starts to bog out and backfire abit. As soon as you stop it will shut itself off. Going about 35 km/h with the engine at 4200 rpm will drop down to about 3780 rpm then will come back up to 4200 rpm roughly. As...
  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. 2010 Polaris Sportsman 500 HO- backfiring and sputtering

    ATV Repair and Maintenance
    Hello everybody. I have a 2010 Polaris Sportsman 500 HO that is having some issues, I have tried all the basic stuff and nothing has worked, so here I am asking for you help. The machine has less than 400 miles on the odometer and 53 hours on the clock. I don't ride it every day, but try to at...
  4. frequent shutoff and backfiring problems

    ATV Repair and Maintenance
    I've got an 09 polaris sportsman 500 ho (not efi) and after this winter it has been wierdly just shutting down and the screen would go blank and I would have to restart it. Sometimes when I try to restart it, I turn the key on and the screen is still blank. Sometimes I might I have to wait about...
  5. 1997 trail boss Help!

    Polaris Trail Boss
    Im having a issue with it not starting only thing it will do is back fire out the carb i have fresh fuel and new plug Im getting spark and gas on plug Now here is what ive done: New plug and Fresh fuel rebuilt top end i used the stock piston and bought stock 72mm rings i bought gasket kit for...