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Thread: Cylinder honing

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  1. #1
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    Question Cylinder honing

    Rebuilding 1977 R100S, changing piston rings. Is cylinder honing necessary?

  2. #2
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    I'm under the impression that new rings should be introduced to honed cylinders in order for them to develop their seal. I 'm planning on honing my nikasil cylinders this winter before installing new piston rings.

    Jim

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    Administrator 20774's Avatar
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    Quote Originally Posted by ocoinji View Post
    I'm under the impression that new rings should be introduced to honed cylinders in order for them to develop their seal. I 'm planning on honing my nikasil cylinders this winter before installing new piston rings.

    Jim
    Be sure and consider how you hone nikasil cylinders. They require a special hone, if required.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

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    Kurt,

    Already did some research on that. I have't bought the hone yet but i will be buying a 240 grit Aluminum oxide ball hone for my nikasil cylinders. Thanks for looking out for me though.

    Jim

  5. #5
    Benchwrenching PGlaves's Avatar
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    I would thoroughly wipe the Nikasil cylinders with laquer thinner, examine the existing cross hatch and call it good. Unless you have considerable experience it is easier to mess them up than improve them.

    Old iron cylinders - yes. Nikasil, I personally wouldn't do it. YMMV.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
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    My nikasil cylinders are quite polished where the rings were riding. I can still see some cross hatch but i would say they are more polished than cross hatched. I talked to Ted Porter and he said they are supposed to be honed. Your point on comfort level and experience is well taken.

    Thanks,
    Jim

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    Administrator 20774's Avatar
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    How many miles on the bike or since last rebuild? How does the current cross-hatching look? I think in general, you should hone such that you can get the cross-hatching back into the cylinder walls...this promotes ring seating...without out, they might not seat.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  8. #8
    Outlander Omega Man's Avatar
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    Quote Originally Posted by 155396 View Post
    Rebuilding 1977 R100S, changing piston rings. Is cylinder honing necessary?
    Welcome to the forum! IMO, you've come too far to not do the whole job. As Kurt mentioned, how does the cross-hatching look? If it's good, I'd as least "break" the glaze.
    OM
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