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  1. #1
    ptscon's Avatar
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    Question Can this cylinder be honed into shape?

    So I thought I was starting to reassemble things when I noticed this on #1 when cleaning the piston crown.

    I know the previous owner had a leaky intercooler on this ski, I'm guessing it sat a little too long with water in that cylinder.

    Does this look like something that can be honed out? Realllllly want to avoid going oversize just because of this one cylinder.

    No compression issue before I took things apart. It was still mid 130s when I tested it back in July.








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  2. #2
    Greggpru's Avatar
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    I would lightly touch it with 400 stones and put new rings on that piston. Check your bore to make sure in in service limits . Can you catch you finger nail on any of the marks?

  3. #3
    ptscon's Avatar
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    Quote Originally Posted by Greggpru View Post
    I would lightly touch it with 400 stones and put new rings on that piston. Check your bore to make sure in in service limits . Can you catch you finger nail on any of the marks?
    I can only feel a change in texture when sliding my finger over that spot.

    Sucks I'll have to get a new set of rings, this motor only has 110 hours. I wonder if I should do a light hone on all cylinders while I'm at it, only extra cost is the rings.

  4. #4
    Greggpru's Avatar
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    Quote Originally Posted by ptscon View Post
    I can only feel a change in texture when sliding my finger over that spot.

    Sucks I'll have to get a new set of rings, this motor only has 110 hours. I wonder if I should do a light hone on all cylinders while I'm at it, only extra cost is the rings.
    I would personally do all 3 . Do #1 1st to make sure it cleans up. Looks like it should.

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  6. #5
    Sanfish's Avatar
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    See the crisp horizontal line...that is where the ring lightly stuck to the wall (#1 at TDC). Since its on side of wrist pin, piston should not show signs of wear.

    But no, it doesn't "look" like you need to bore bigger. Since you are this far I would without hesitation re-ring and hone all three holes. If you plan to keep ski for a while, do it now. I bet if you check ring gap on top ring you will see its over-spec.

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  8. #6
    ptscon's Avatar
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    Yea looks like I'll touch up all 3, planning to keep this thing for a long time.

    Looks like rings and rod bolts are the only non-reusable items in the lower half?

  9. #7
    Sanfish's Avatar
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    Quote Originally Posted by ptscon View Post
    Looks like rings and rod bolts are the only non-reusable items in the lower half?
    Well, if rings were perfect you can re-use but that's rarely the case and highly unlikely in your case.

    I re-use the rod bolts

  10. #8
    Greggpru's Avatar
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    Toss another $60 at it and put ARP rod bolts in it.

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  12. #9
    ptscon's Avatar
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    Well looks like this will be a fun project

  13. #10
    ptscon's Avatar
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    Has anyone used one of those FlexHone "ball hones". Wondering if I should do it myself or take it to a shop. I really like doing stuff myself if possible.

    My previous honing experience was on a lawn tractor with one of those $20 spring tools lol

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