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  1. #1
    qbzonk's Avatar
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    Stock compression on GP800?

    Anyone know what this should be? Service manual specs show it at 560 kPa which converts to 81.2 psi. Is this correct?

    Thanks in advance.
    Last edited by qbzonk; 08-04-2007 at 05:20 PM.


  2. #2
    Flying Scotsman's Avatar
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    Dont know I plan on finding out though.
    Did a comp test on a 98 GP1200 today and got 121/121.
    Battery may not have been fully charged I didnt have time to test it but i'm sure comp it good.
    For some reason I think 128psi would be right.
    He had good spark good comp but has fuel issues.
    Is 120 right or 128

  3. #3
    qbzonk's Avatar
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    No idea. Like I said manual showed the above, but that just doesn't seem right? Currently I have 125F & 140R

  4. #4

    Talking

    I think its suposed to be 120 or 130 im not sure which one but its one of them , but your too far apart on the difference of your compressions !! make sure your pv's are in the down position one could be stuck a little IMO ?

  5. #5
    qbzonk's Avatar
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    Quote Originally Posted by blaster800 View Post
    I think its suposed to be 120 or 130 im not sure which one but its one of them , but your too far apart on the difference of your compressions !! make sure your pv's are in the down position one could be stuck a little IMO ?
    When the motor cycles, they both seem to move the same amount (coupling between the two rotates the same). I've got waveeater clips, so I know I didn't drop one or anything like that. Aside from removing the exhaust and opening the PV covers, how else can I check to see how far down or up they are?

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