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  1. #1

    Best botton acceleration pump setup for drag

    Which is the best botton acceleration pump setup for GPR triple pipes??? 12 or 14 vains??? seatback or no seatback??? 155mm, 158mm or 160mm???


  2. #2
    novice duudu's Avatar
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    Set back yes. 160 mm helps but robs power. Don`t think the 1300 even with triples can turn 160mm

  3. #3
    Quote Originally Posted by duudu View Post
    Set back yes. 160 mm helps but robs power. Don`t think the 1300 even with triples can turn 160mm
    Someone try the 158mm seatback skat pump in gpr1300 triple pipe???
    How much top end I can lose???

  4. #4
    Ya Boy Trevor bajaeater's Avatar
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    few mph.

  5. #5
    Quote Originally Posted by bajaeater View Post
    few mph.
    Do you used that pump with gpr1300 with triples???
    How many I can lost -1,-2,-3mph...???

  6. #6
    Ya Boy Trevor bajaeater's Avatar
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    cant remember mm on mine. have to check. ill have to check when i run mine back to back but should be a few

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