kit...predator

  1. R

    pmr stage-2 kit...predator backfiring?

    So I bought a PMR stage 2 kit from hotrodminibike.com. I got the old air filter and muffler off the engine and put on the UNI air filter and straight pipe header. Also put a new jet in the carburetor(not sure what size....what ever jet and e-tube came with the kit). I fired the motor up(not...
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