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  1. How To Stop Engine Pinging / Pre Ignition?

    Polaris Predator
    I have a Quadzilla XLC 500 which I believe has the same engine as the Predator. I have had the head gasket replaced as it blew and also needed to get 1 or 2 valves reseated, the water pump seal has also been replaced and the quad is now all back together and runs perfect apart from...