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  1. #1
    Riding Dirty GP1300R's Avatar
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    Hey guys, posting this for a buddy having problems.

    My buddy just bought a 2001 GP1200R. We picked it up today and he put it in the water tonight.
    Fired right up we cruised at about 5MPH for a few and then he went WOT, the ski picked up good and ran good. Then out of nowhere it would shut off. It had trouble restarting like there was no power. I started pulling him back with my ski and then he found a loose terminal on the battery. We tightened it and the ski started right up and hasn't shut off since.
    Now the problem is that the ski is VERY doggy. It also with not rev past 4900RPMs. The plugs look good but we are going to replace them anyway. Another friend said it could be the valves. They do cycle when you turn the ski on and shut it off.
    If you have any ideas I would appreciate any help you can give.


  2. #2
    icky002's Avatar
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    If it was the powervalves wouldn't the ski still rev all the way, but just be real slow?

    Check the intake grate is clear. Then I guess time to check compression.

  3. #3
    Moderator OsideBill's Avatar
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    What is the compression? ski needs fuel, compression, and spark to run.

  4. #4
    Has it had the cat removed and replaced with a D-plate? Sounds like the cat could have come apart and clogged the exhaust.

  5. #5
    Riding Dirty GP1300R's Avatar
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    Quote Originally Posted by treemoney View Post
    Has it had the cat removed and replaced with a D-plate? Sounds like the cat could have come apart and clogged the exhaust.
    I am pretty certain the cat has been removed.

    I should know compression shortly.

  6. #6
    4.0l sahara's Avatar
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    Do those have power valves? Like RAVES on a seadoo. they can cause them to not reach peak rpm. May want to clean them. It's fuel injected right? I'm not up on my 1200's well if it does have carbs i would go threw them. If there dirty it could run lean and burn up a cylinder.

  7. #7
    Riding Dirty GP1300R's Avatar
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    It has a dead cylinder. The rear-most cylinder has no compression, the front 2 are at 110psi.

  8. #8
    WATER WOODY's Avatar
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    Time to inspect.Pull the head and get some pics posted. Is there oil in the bottom of the hull?

  9. #9
    Riding Dirty GP1300R's Avatar
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    Piston is shot, head is chewed up, cylinder is scored. This sucks!

  10. #10
    32 Valves To Love! Racecar_Dave's Avatar
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    now he has an excuse to go 1390

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