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!!
Thank You!!