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  1. #1

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    Compression test thoughts.

    This week I am working on the 750 to 780 conversion ski. I did a comp test on the 780 donor motor and this is what I got. 130 Mag 130 Cen and 110 PTO. This is the first ski I will have running and it is currently stock with maybe an after market water box and some vortex F/A's later. What would you guys do about the rear cylinder? Hone and re-ring or just run it like it is? Also, the piston wash's look good.


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Oct 2006
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    Hone and re-ring it I say. 130 across the board would be better. Plus you shouldn't have more than 10% variance between cyls.

  3. #3

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    Yeah thats kinda the direction I was leaning. Thanks!

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