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  1. #1
    2000 GPRXP 4tec shooter98xpl's Avatar
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    2001 GPR R&D power plenum Jetting ???

    I have a buddies 2001 GPR and redoing his carbs. He is running the power plenum on it. Does anyone have the jetting specs for this setup? He has a protec head on it running around 150 psi. Currently he has 117.5 main, 95 pilot (low speed), 95 gram spring and 1.2 n/s. Accelerator pump is still on the carbs and working.
    If anybody has the correct jetting specs for this can you please post it up?
    thanks in advance,
    SHOOTER


  2. #2
    2000 GPRXP 4tec shooter98xpl's Avatar
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    anybody? Dave if you read this, call R&D up and ask them what their jet specs are with the accelerator pump. Your motor is back together, sealed up, pressure tested and ready to drop in. I'd like to get it done by Sunday,
    SHOOTER

  3. #3
    Duke's Avatar
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    Don't have specs for that FA but that sounds scary lean!

    I hate to post post on a thread that I don't have experience with
    but thats my 2 cents.

  4. #4
    Mongoose's Avatar
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    110 lows
    120 highs
    95 gram spring
    1.5 needle and seat.
    Start lows at about 1,1/8th out.
    Highs out about 1,1/2.
    It will start and run fairly well with the above settings, just dial in from there with a tach.

    The above assumes your dissabling the pos accelarator pump!

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