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  1. #1
    BadinGPR's Avatar
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    2003 GP1300R terrible fuel consumption

    Hello guys, been a while since I have been on here but I have an issue with a 03 1300 I just picked up for my son. It basically bogs during midrange riding and gets terrible fuel mileage. It is all stock except for a d-plate and chip, 91 hours and 120 lbs across all cylinders. We can ride together with me on my 1200r and he burns twice the fuel and is about 5mph's slower on top.. Any help is greatly appreciated! I've already checked the pv's and they appear to be working correctly. Also, the temp sensor (I think thats what it is) located on the front cylinder is extremely corroded. Just wondering if this sensor had anything to do with fuel mixture.


  2. #2
    BadinGPR's Avatar
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    Does anybody know what this sensor does?

  3. #3
    powerstroke specialist mikegp's Avatar
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    its a temp sensor.

  4. #4
    BadinGPR's Avatar
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    U'r a genius...so where does it send the "temp"
    and how is it used to affect the performance
    of the engine?

  5. #5
    its just an over heat sensor.

  6. #6
    BadinGPR's Avatar
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    I was thinking it might have something to
    do with the efi since my 01 doesn't have this
    sensor...and since it plugs into the efi wiring
    harness, or appears to.

  7. #7
    yes its just an alert. There is an atmospheric sensor up frot in your hull thats about the only senors it takes into consideration if i remeber correctly. Dont forget its not just 100cc more it has more porting so it will use more fuel. The mid range bog is common and can be remedied with a fuel controller but should not be needed with a stock ski. I did the d plate on mine and took the airbox off back in the day and it did need a controller.

  8. #8
    BadinGPR's Avatar
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    But this thing is a pig both performance wise
    and economy wise. I used to ride with guys
    that rode the nonpowervalve and power valve
    1300s and they always got better mileage than
    me. This thing just seems way rich to the point
    that it won't cruise. It's either idle or wot. Every
    now and then it will accelerate normally if
    start after sitting for a while. It will only gps at
    58.

  9. #9
    Can you test your fpr? Could be too much fuel pressure at the regulator. I honestly am taking a shot in the dark to try and just trying to help you out. If injector pulse width is normal - which is hard to measure, then the pressure is too high. If the fuel pressure at the rail is too high its pushing too much fuel into the chamber. If the injector pulse width is too wide it could also be allowing too much fuel. I doubt the FPR is adjustable on these things but never know. Are the plugs reading rich/black?

    How about checking all the engine/efi sensors everywhere; like TPS, map, atmo, temperature, etcetc. Again I'm not sure which would or could cause this. I own a GP12r.

    Best regard

  10. #10
    BadinGPR's Avatar
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    I'm not familiar with the efi skis either so I was
    hoping that there was a sensor that controlled
    a cold start cycle that maybe was maybe stuck.
    Just seemed logical to me that there would be a
    function for this purpose...it seems awfully like
    it is running in a cold start mode or even richer
    than that. There is no display code or warning but
    it does beep on start up and when it's shut down...my
    1200 only beeps on start up.

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