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  1. #1
    Buss's Avatar
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    Unhappy Engine failure GP1300R

    Here are photos of the third cylinder on an engine operating 17h. Cylinders seized following a motor overload (PWC towing a broken), and lack of cooling.
    there are no scratches on the walls, just a deposit of material due to the piston skirts.

    What do you think of this?









  2. #2
    Quote Originally Posted by Buss View Post
    What do you think of this?

    It looks like you were trying to go too fast while towing the broken ski. Put too much load on the motor and it overheated.

    Send the cylinder out to have it renicked and get a new piston and slap it back together.

  3. #3
    is it my eyes, or does this look way lean? are you running an efi controller with those heads? you should have a look at the other 2 cylinders...

  4. #4
    You mean the lack of pistonwash? It's either running super lean or there's a water leak and thats why the top of that piston is shiney and new

    Look at the plugs sitting on top of the other heads.... They look dark, so I'm going with water leak. But #3 runs lean, so it could be either or both!

  5. #5
    Quote Originally Posted by treemoney View Post
    You mean the lack of pistonwash? It's either running super lean or there's a water leak and thats why the top of that piston is shiney and new

    Look at the plugs sitting on top of the other heads.... They look dark, so I'm going with water leak. But #3 runs lean, so it could be either or both!
    Yes lack of piston wash. only the OP can say if he saw evidence of water intrusion upon opening the head.

  6. #6
    Buss's Avatar
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    Quote Originally Posted by treemoney View Post
    It looks like you were trying to go too fast while towing the broken ski. Put too much load on the motor and it overheated.
    I went too fast while towing, rookie mistake.

  7. #7
    Quote Originally Posted by Buss View Post
    I went too fast while towing, rookie mistake.
    how fast is too fast, bow plowing or were you on plane? nonetheless it`s a lot of strain on a GPR...

  8. #8
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    Quote Originally Posted by Pale Rider View Post
    is it my eyes, or does this look way lean? are you running an efi controller with those heads? you should have a look at the other 2 cylinders...
    I wiped the piston head with my finger;
    my EFI is set to 3.4.1.6

  9. #9
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    tomorrow I'll drop the engine and watch the other two cylinders, I'll post photos

  10. #10
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    Quote Originally Posted by Pale Rider View Post
    how fast is too fast, bow plowing or were you on plane? nonetheless it`s a lot of strain on a GPR...
    ~ 40mph speed and load too large too (Kawa 15F + passenger)

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