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  1. #1

    Default 1999 Polaris 500 XC SP backfires through exhaust

    I have a 1999 Polaris 500 with the Liberty Engine and it has only 3700 miles. I am having problems with rough running and backfire through exhaust until it runs at about 5000 rpm or more the it runs great. I am running new BR9Es Plugs and will buy the RN2C champions tomorrow the. It has fresh gas and the main jets are clean.. Any suggestions.

    Thank You!!

  2. #2
    Join Date
    Dec 2009
    Location
    so wi
    Posts
    289

    Default

    check throttle safety switches for proper adjustments

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