Resurfacing Brake Drums?

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Resurfacing Brake Drums?

This is a discussion on Resurfacing Brake Drums? within the Z50, CT70 and JDM Monkeybikes forums, part of the General Talk category; Has anyone ever had their brake drums resurfaces? If so, are there any tricks? My initial thought is how they would chuck it up and, ...

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    Resurfacing Brake Drums?

    Has anyone ever had their brake drums resurfaces? If so, are there any tricks? My initial thought is how they would chuck it up and, well, where to actually take them to get done.

    Currently, I have 2 sets of 3-bolt R hubs that I'd like to get in perfect order. Anyone have any idea on minimum, or rather maximum diameter these can go?

    As these seem to be getting harder to find in near mint condition, I'd like to save the ones I have to use on my road and mud setups.


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    Quote Originally Posted by 66Cooper View Post
    Anyone have any idea on minimum, or rather maximum diameter these can go?
    I've never resurfaced them but here is the specs from the Honda Z50R manual. The first pics are for the front.
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    This is the specs for the rear brakes.
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    So I have half a millimeter to work with?? That doesn't sound like a lot.
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    Quote Originally Posted by 66Cooper View Post
    So I have half a millimeter to work with?? That doesn't sound like a lot.
    That's right and it not very much.
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    You might find a brake drum hone at your local auto parts store that will work, just to de-glaze them. I think most folks just clean them up with emory cloth.

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    I know that the front drum felt out of round when trying to setup pad clearance.

    Does anyone have specs on the larger, 4-bolt hubs? Do they have more meat to work with?
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    The wear limit for a 4-bolt hub drum is 111mm. Can't find the original diameter.

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    [source, z50j01.pdf page 114]

    Inner diameter of drum 110.0 - 110.3mm, replace at 111mm
    Last edited by nielspbr; 03-16-2017 at 01:18 PM.

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    Great info guys. Thanks!

    Now, just have to figure out what to do.
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    My way. Media blast them. Works perfectly. Set of TBparts brake shoes and you have super brakes.
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