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  1. #1
    North Carolina Hoovermaneuver's Avatar
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    My 2000 1200 GPR broke

    I was riding for 20 minutes this weekend when all of a sudden I lost power. I was able to idle to a boat ramp. No power at all. I can only idle. Got home and checked the compression. Back to front.
    115, 120 & 60. Any ideas? Anything I can check before tearing into it?

    P.S.
    This is what is on it.
    Wave Eaters & Couplers, Riva Exit Nozzle, Riva Anti-Cav Cone, Riva Ride Plate & Intake Grate, PBK, Tiny-Tach, Premix, Riva F/A's, D-Plate & Chip, Rebuilt Carbs W/Drilled Return & Oside Bill's Jetting Specs, Riva Seat Cover, Hydro-Turfs.
    Last edited by Hoovermaneuver; 11-05-2013 at 12:27 PM.


  2. #2
    RaiderMagic's Avatar
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    well, 60 is really low. I'd do another check to be sure, but you likely have a broken ring or something if it's half of the others.

  3. #3
    North Carolina Hoovermaneuver's Avatar
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    Oh crap. I was hoping it was a bad reed or something simple.

  4. #4
    TuningForkMarine's Avatar
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    pull the head. let us see it. looks like you might have a oil delivery issue.

  5. #5
    North Carolina Hoovermaneuver's Avatar
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    It is premix

  6. #6
    Happily Self-Employed WFO's Avatar
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    With the compression that low, you definately ate a piston. Time to tear it down and see what happened

  7. #7
    North Carolina Hoovermaneuver's Avatar
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    But, But, I don't know how & I don't wanna!...lol

  8. #8
    North Carolina Hoovermaneuver's Avatar
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    I'm going to read the hell out of this forum and then attempt to do it myself during down time this winter. I learned what reeds were and what they did yesterday. I'm on my way...

  9. #9
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  10. #10
    It seized on you most probably and broke a component like a ring....since it is premix ?? I had it happen on a GP1200 non premix twice and it was an oil flow problem..check valve was in backwards from factory....warranty covered. You did add oil hopefully on the last fill. Personally I think pumps are better. Since you lost almost all power and kept it running I assume you have scored the piston wall. You will need to start pulling it apart. I had to do mine once to replace a leaking crankcase gasket. The problem is if you are not familiar with the engine and rebuilding you could mess up and waste a lot of money. I would try to look at the cylinder and if it looks bad I would consider pulling the block and either replacing it with a rebuild....probably $1000, or seeing if the cylinder can be bored and fixed. If it is a simple honing and ring replacement you might be able to do it but you need to get the broken parts out of that crankcase. Since the comp is only 60 in one cylinder you have already done damage more severe than just a wall scoring and you have to do a teardown no matter what.

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