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  1. #1

    Join Date
    Jul 2006
    Location
    1600Lisbon, Portugal - Europe
    Posts
    210

    Starting from Zero testing XP/XPL Pump

    Have upgrated my XP/XPL 2001 from 951cc stock, to second hand 1050cc rotax racing kit last bore and new 92.04mm piston's.
    I'm confused wich impellor to go to the best top speed.
    Any help?


  2. #2
    m schmidt's Avatar
    Join Date
    Mar 2007
    Location
    East, Tn.
    Posts
    235
    +1
    2
    In a stock pump I think a 15-20 concord works real good. I run a 15-21 concord in my setback pump.

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