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  1. #1

    Join Date
    Jun 2006
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    Denmark
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    Unhappy Help! Gp1300r poor acceleration!

    Hi Guys,

    My Yamaha Gp1300r, 2003 could suddenly not run. I found out that the cat. was broken.

    Then I bought, the jetworks D-plate with the riva sensor chip.

    Now in water, It have a very very poor acceleration. Topspeed 45 mph.

    What can it be? Maybe some stuff from the old cat, that has stucked in the exhaust?


  2. #2
    The first thing I would check is for exhaust leaks. That is one of the leading causes of that big of power loss.

  3. #3

    Join Date
    Jun 2006
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    Denmark
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    51
    I have checked for exhaust leaks... nothing there...

    Anyway, I have installed the jetworks o-plate on the same place as the cat. is that the right place to install it?

    The only thing i have not checked, is the sound supressor (muffler). Is that hard to change?
    Last edited by jesperducati; 06-10-2007 at 02:34 PM.

  4. #4
    Its not to bad if the clamps are facing the right direction for you. After the first time its pretty easy for that reason.

    1.Remove the battery
    2.Remove the battery box 2-10mm and 2-12mm nuts (it dont have to come off totally, just out of the way).
    3.loosen the clamps on the hose running from the waterbox to the SS and remove the hose.
    4.remove the 3 10mm bolts in the back of the hull where the exhaust exits.
    5. pull out the SS (it takes some manuvering but it will come out).

  5. #5
    mrbtd's Avatar
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    Jul 2005
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    Lindenhurst, Illinois, United States
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    Quote Originally Posted by porksword View Post
    Its not to bad if the clamps are facing the right direction for you. After the first time its pretty easy for that reason.

    1.Remove the battery
    2.Remove the battery box 2-10mm and 2-12mm nuts (it dont have to come off totally, just out of the way).
    3.loosen the clamps on the hose running from the waterbox to the SS and remove the hose.
    4.remove the 3 10mm bolts in the back of the hull where the exhaust exits.
    5. pull out the SS (it takes some manuvering but it will come out).
    Do this in this ORDER....Dont try and disconnect the hose from the SS box its a PITA do get it back on.

  6. #6

    Join Date
    Jun 2006
    Location
    Denmark
    Posts
    51

    Talking HI guys,

    Thanks alot...

    I will try this...

    Anyone that knows if i will get some more power if i buy and installs the RIVA GP1300R Free Flow Exhaust Kit?

    And will the GPR Pump Exit Nozzle (87mm) gives some better accel/speed?

    Thanks again...

  7. #7
    Nothin' runs like a Deere IowanGPR's Avatar
    Join Date
    Sep 2006
    Location
    Waterloo, IA
    Posts
    1,608
    you are using an EFI controller right? i think maybe you need one, but could we get more info other than just poor accelleration?? what does it sound like ? how do your plugs look?

    Ben

  8. #8
    Quote Originally Posted by jesperducati View Post
    Thanks alot...

    I will try this...

    Anyone that knows if i will get some more power if i buy and installs the RIVA GP1300R Free Flow Exhaust Kit?

    And will the GPR Pump Exit Nozzle (87mm) gives some better accel/speed?

    Thanks again...
    Free flow might give you a little better holeshot but a little lower RPM and lower top speed.

    87mm will give a little better holeshot, more RPMs, but a little less top speed (unless you are already a little low on RPMs) then it could help top speed.

    Confused yet?

  9. #9

    Join Date
    Jun 2006
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    Denmark
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    Smile

    To IowanGPR:

    I don´t have the EFI controller! (Will that give serious power?)
    The plugs is ok (brown, depends on how much throttle I give it).
    And the sound is the same as before. (sounds normal).
    No cracks on the exhaust.

    But i still need to check the sound supressor. (muffler).


    To porksword:

    I thought these performance mods will give something I can feel... I don´t want to spend alot of money on mods, where I just can feel a little diffrence. Just hoped to find a serious mod, that I really can feel the diffrence. Any great ideas...? A mod like the tripple-pipes for the GP1200R.

  10. #10
    Tripple pipes, a modified ride plate, 150 psi heads, reeds, and porting will all give you results you can feel.

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