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  1. #1

    Join Date
    Apr 2011

    changing barrels on gp1200

    can u change the barrels on a gp1200 to the 1300 ones? or is it just best to bore the original barrels and put bigger pistons in ?

  2. #2

    Join Date
    Apr 2006
    South MS
    less expensive to just change the cylinders and pistons, especially if you sell your topend and buy a 1300 top end

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