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  1. #1
    BLACKandSILVER06GPR's Avatar
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    03 GP1300 hesitation

    My brothers 03 gpr has a hesitation when your cruising at mid range and than pin it to full throttle. It sort of feels like a bog. Does any one have an idea of what could be causing this. Clogged injectors? Spark plugs are new.

    Thanks


  2. #2

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    My friend has an 03 gpr that does the same thing.
    He does not have a fuel controller so I suspect it may be caused by the oem fuel map being lean in mid range.
    You can also check the jet pump for obstructions or dinged impeller.

    Ceril

  3. #3
    04gtxsc's Avatar
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    That is a normal thing with the GPR. There is always a slight bog if running along under 4500 rpm and then go wide open it will hesitate slightly. Just try easing into it slower and you will find that it will not bog as bad.

  4. #4
    You need an efi controller

  5. #5
    BLACKandSILVER06GPR's Avatar
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    Thanks everyone. Makes perfect sense now

  6. #6
    04gtxsc's Avatar
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    You dont need a controller unless you have changed the keyway or increased the compression or porting.

  7. #7
    BadinGPR's Avatar
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    My 03 had the same "dead" throttle response mid-range. You
    don't need a controller but I got one and it really woke the
    ski up...made a huge difference in the throttle response.

  8. #8
    Prism's Avatar
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    Agree on the throttle response input everyone has shared so far. One thing I noticed, on a ski with stock compression and timing the bog seems worse when running super unleaded fuel. Running a stock ski on 87 octane seems to help.

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