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  1. #1
    Cashito's Avatar
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    2007 Yamaha GP1300R: Bog/Hesitation from 1/4 to Full Throttle

    Had dplate added and free flow exhaust.
    I left the ski sit about 2 months and took it out yesterday.
    It ran great except when cruising at about 1/4 throttle then pinning it (full throttle) there was a hesitation for about 1 second then took off.
    This happened ever time, but didnt happen when idling then full throttle.

    Wondering what might be the cause and how to fix.

    Thank you!


  2. #2
    banshee350racer's Avatar
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    get rid of the free flow and your problem will be solved, otherwise you will have to get a fuel controler to add more fuel in your mid range i had the same problem i rode a half dozen times and that lean spot and it scored all three of my pistions and cylinders and i had to do a rebuild

  3. #3
    Cashito's Avatar
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    Ordered the efi controller, any recommendations on tuning it?

  4. #4
    banshee350racer's Avatar
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    i honestly have know idea I'm just putting the final touches on my motor this weekend and it will be my first time with the EFI controller also. all i can say is read your ass off, that is what i have been doing all week. there are great articles written on this topic that should give you a good baseline to start at but with all different motor setups, elevations, air, water temp, and humidity your on your own. I'm in Illinois so my settings will be completely different than yours! so start reading

  5. #5
    mad-italian's Avatar
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    Quote Originally Posted by Cashito View Post
    Had dplate added and free flow exhaust.
    I left the ski sit about 2 months and took it out yesterday.
    It ran great except when cruising at about 1/4 throttle then pinning it (full throttle) there was a hesitation for about 1 second then took off.
    This happened ever time, but didnt happen when idling then full throttle.
    Wondering what might be the cause and how to fix.

    Thank you!

    I recently just bought my 2005 GP1300R and i have the exact same problem. The only modification that it has is a D plate with chip. After reading many threads on here, it sounds like I need to get a fuel controller, to correct the lean spot, even with just having a d plate. did you have any luck with yours? also did you have to increase anything with the oil injection? i read a thread from Jim's performance about having increase the oil by adding some to the fuel to compensate for the additional fuel

  6. #6
    Check the spark plugs?

  7. #7
    Happily Self-Employed WFO's Avatar
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    all the non-powervalve motors have a dead spot in the mid range

    a fuel controller may clean it up a little, but its just the way they are

    and no, you dont need a controller when adding a D plate

  8. #8
    mad-italian's Avatar
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    the plugs looked good. we put new ones in also. i also had the entire fuel system cleaned, still having the issue.

  9. #9
    mad-italian's Avatar
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    Quote Originally Posted by WFO View Post
    all the non-powervalve motors have a dead spot in the mid range

    a fuel controller may clean it up a little, but its just the way they are

    and no, you dont need a controller when adding a D plate
    i read that hesitation is something to be expected. i am just worried that it is lean spot causing the bog, and i don't want to risk hurting the engine. it chokes out for a second on mine when this happens. runs great at idle and wide open. but whenever i go from cruising speed and punch full throttle it will bog, especially when coming out of a turn... after doing some thread searches, it is about a 50/50 debate on whether the 2005's need a fuel controller with just a D plate & chip.

  10. #10
    Happily Self-Employed WFO's Avatar
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    then go get yourself a controller

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