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Thread: Another Problem

  1. #1

    Another Problem

    Well here goes. I buy the ski blown up. Middle piston has a chunk taken outta it from powervalve dropping. I rebuild the whole top end with new power valves and all, cylinders were all good so I left them alone. I only have about 7 hours since rebuild. The last couple times I went out I noticed it has been more and more slugish, also back firing every now and then. Finally today gets to the point that It will only do like 45. So I pull head and low and behold middle cylinder has a nice chunk outta the same spot where it was hitting powervalve. But powervalve never dropped I installed waveeater clips and couplers. It doesnt look any lower then the other 2 but it must of hit it. Has this happened to anyone else. I dont wanna keep rebuilding if its just gonna keep happening. Oh also its a 2001 GP1200R


  2. #2
    Mr Bill's Avatar
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    Pictures would help!

  3. #3
    My son (mohawk man) jeffsntx's Avatar
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    Did you clean out the cases when you rebuilt it?

    If not, there was probably schrapnel left from the first failure that caused the damage.

  4. #4

  5. #5
    I cleaned the bottom the best I could with magnets vacuum and mirrors. I couldnt find anything in it. It was still running good when the guy I bought it from took it apart he said it was just running slow. What do you guys think. The cylinder may just need honed Other than the piston being shot. The power valve has some chips outta it but def nothing major. I am hoping to be able to use the cylinder and PV but if not I guess I will buy them. I am just hoping the PV or cylinder was not the cause of this. IT aslo has the newer style PV's not sure if that matters or not.

  6. #6
    WE DONT DIAL 911 RDH's Avatar
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    Quote Originally Posted by whiteyz View Post
    I cleaned the bottom the best I could with magnets vacuum and mirrors. I couldnt find anything in it. It was still running good when the guy I bought it from took it apart he said it was just running slow. What do you guys think. The cylinder may just need honed Other than the piston being shot. The power valve has some chips outta it but def nothing major. I am hoping to be able to use the cylinder and PV but if not I guess I will buy them. I am just hoping the PV or cylinder was not the cause of this. IT aslo has the newer style PV's not sure if that matters or not.

    ive noticed some pv's have different size spacers, check and make sure one valve doesnt stcik down farther than the others..

  7. #7
    well the newer style ones did have different spacers but it seems like only the middle one may have been sticking out alittle far if at all any.

  8. #8
    Robsauto2's Avatar
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    did u clean the top of that piston? If not it looks like possible water intrusion from the head gasket or manafold gasket.

  9. #9
    no when I first broke this ski in I had a bad water leak and sucked a ton of water into the motor through the carbs but was able to get it out and run the piss outta it to try it all up. Do you think that is what caused this???

  10. #10
    WE DONT DIAL 911 RDH's Avatar
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    Quote Originally Posted by whiteyz View Post
    no when I first broke this ski in I had a bad water leak and sucked a ton of water into the motor through the carbs but was able to get it out and run the piss outta it to try it all up. Do you think that is what caused this???

    did u run the piss out of it without a hose on it? or out of the water?

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