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  1. #1

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    Can I? Cylinder / piston clean up solution..

    I took my top end off last night, and there are score marks from water intrusion... I know how the water got there so the problem is fixed.

    Can I take some 220 grit emery and evenly sand the cylinder bores and pistons?

    The score marks are not that deep, and they are no higher than the bottom of the exhaust port. The score marks are also not all the way around either the piston or the cylinder.

    Mostly on the exhaust side.

    I really don't, if I don't have to, spend the money on the ball hone. The cylinders have no more than 10 hours on them since a fresh bore / piston job....

    I know it's only 40 bucks, but I've spent sooo much on skis and parts I have to stop.


  2. #2
    96XPSS's Avatar
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    Some people have used acid to remove the aluminum from the cylinder walls too. You can easily sand the scores away on the sleeves, but your piston is probably trash. Even in you get the high spots it needs a smooth total surface area to produce max rpms.

    I'd sand away the smears on the sleeves, hone and buy a new piston/ring set.

  3. #3
    2Blue's BFF! dsolie's Avatar
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    matt,

    if you and heather decide to come north, bring the cyl.. I have a ball hone.

  4. #4

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    Thanks man... they're my 787 jugs. Appreciate it!

  5. #5

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    Matt,
    Muratic acid (dilute hydrochloric acid) works great to remove imbedded aluminum from cast iron cylinder walls. It has very little effect on the cast iron, but, it will eat away the aluminum.
    Robert V

  6. #6
    PiMPNXP's Avatar
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    Do not use a ball hone on a two stroke cylinders. It will damage the ports (rounds them out). If you insist on using it just do it a few times as possible.

    They are vertical lines on the lower part of the sleeves correct?

    If they are lower then the exhaust ports I would not worry about them. But if you must... I would use some sand paper (200+) or scotch brite pads (just enought to get the high spots out). you can simulate the hone pattern by turning the scotch brite as you are bring it in and out of the cylinder and switching directions.



    Solie offered to hone your balls.....LOL

  7. #7

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    Thanks Pimpn and sd daddy... All the minor damage is below the ex. port.... I sanded them with 220 grit rotating constantly as to not dig a hole.

    I also sanded the pistons. I put the cross hatch marks in on the jugs, but I thing running a ball hone through them like you said, a few times, to get any high spots out would be worth it.

    Then new pistons... Actually, I'm selling the entire setup. If the guy who is interested doesn't buy it, I'll hone it and post up the parts with the rest of the stuff in the classifieds..

    Pimpn... I have a phase 3 Miller long block with your name on it!

    S/d daddy... how did that nozzle work out for you?

  8. #8
    2Blue's BFF! dsolie's Avatar
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    Quote Originally Posted by PiMPNXP View Post
    Solie offered to hone your balls.....LOL
    No, I said I wanted to move my balls around in his hole... GET IT RIGHT!

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