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  1. #1

    port and polish on the gpr1200

    hi, port and polish my gpr engine... anybody did the same with there gpr? did it make a big difference in power??

  2. #2
    Join Date
    Oct 2006
    yes, it does make a difference but its the sort of thing you do last after the hull, pump and everything else in the motor is already done.

    once all other mods are done , typically you will gain 4mph + way better acceleration.

    down side is it will chew more fuel.

  3. #3
    thanks, its pain polishing the intake side... =(

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