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  1. #1

    Join Date
    May 2021
    Posts
    9

    2003 GP1300R Refresh


    Hello from Lake St Claire in Canada. I am glad to finally participate on the site. I have been around for a while reading and have previously only had an RXP215. I always wanted a GPR and when this popped up this week I had to have it.

    The bad: The front Cylinder rod bearing seized during the break in ride taking out the cylinder, crank and case. I am not sure if the piston and rings are salvageable or if its worth trying. The display only reads in kph for some reason? I am assuming there was a problem with the oil system causing the failure.

    The good: Very Clean with low hours and mostly stored inside its entire life.
    The impeller and wear ring look good and stock.
    The only mods are a D plate with Chip and Wave Eater Clips.
    It just had a top end rebuild and has less than a tank through it.
    It came with 2 spare cranks, some crank bearings, full gasket kit and new case halves.

    I am told that everything else works and overall it is very clean and stock. My plan is to rebuild and restyle a bit as well as add any modern features or upgrades recommended by the group. I have done a bit of research and read a lot but as now most of the information is pretty old I may ask for clarification or about alternatives.

    My first questions for the group:
    1. Should I bother trying to have the crank rebuilt to replace what looks like 2 loose bearings(1 main and 1 rod) or just get a remanufactured one?
    2. Should I just plan to run premix and remove the oil system or test it and replace the lines?
    3. Assuming the piston looks good should I just re ring it(and the others?) or replace it either way?
    4. Does anyone have a Cylinder/Crank etc they want to sell me?
    5. Anything else I need to check with this type of failure or the skis age?
    6. Anything that I should do considering the age and the fact that the engine is coming out? I am already planning on pump tunnel reinforcement.
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  2. #2

    Join Date
    May 2021
    Posts
    9
    Well i looked at the head and I am pressure sure I have an oil issue. I am hoping someone can confirm but here is a comparison to a working cylinder and the one that failed. Again this is supposed to be less than a tank of fuel.
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  3. #3

    Join Date
    Jul 2019
    Location
    Buffalo, NY
    Posts
    676
    +1
    45
    Reach out to WFO... he’s done many 1300’s. Being a holiday weekend you may not hear anything until next week.

  4. +1 by:


  5. #4

    Join Date
    May 2021
    Posts
    9

    I have the engine ready to be pulled now. Found a used cylinder to be bored and a machinist to rebuild the crank and assemble/leak test the short block for me. I’ve done dirt bikes but I want to make sure this is done properly and his rates are very good.
    I also found the water box has failed so I’ll be going the gp1200r box route I think.
    I still haven’t found the smoking gun for the failure. The oil system is full with oil through all lines. The return line seems to be broken off but I am not sure that would cause this kind of failure? Either way I have the oil pump block off plate on order.
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  6. #5

    Join Date
    May 2021
    Posts
    9

    I have it all apart now. More damage but still no smoking gun. The oil pump had a line that wasn’t connected but it looks like it was the return line unless the others were connected wrong. Maybe this was enough to not supply oil to the front cylinder? Also it looks like the reed cages were installed in the incorrect order. Not sure if that would have an effect on anything??
    Finally the last kick in the pants is that the rod took out the starter and one of the smaller case bolts. If anyone has a single skinny case bolt they can send me that would be appreciated.
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  7. #6

    Join Date
    Jul 2019
    Location
    Buffalo, NY
    Posts
    676
    +1
    45

    Looks like you need a block as well....
    or am I missing something?
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  8. #7

    Join Date
    May 2021
    Posts
    9
    Yes both halves of the cases are toast. I have a replacement set already.

    Quote Originally Posted by Jonesyfxr View Post

    Looks like you need a block as well....
    or am I missing something?

  9. #8

    Join Date
    Jul 2019
    Location
    Buffalo, NY
    Posts
    676
    +1
    45
    WHEW!!!!
    OK.... cool!!

  10. #9

    Join Date
    Jul 2019
    Location
    Buffalo, NY
    Posts
    676
    +1
    45
    How's the build going??

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