Honda CB750 Sandcast

Any good tricks for restoring the front brake disk on a CB750?

markb · 5 · 1791

markb

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I have a disk in nice shape but would like to improve the looks of the disk itself. I can chuck it on the lathe on the ID and I'm thinking maybe Scotchbrite or fine sandpaper. Any opinions before I try it?
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


Wayne

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Mark
I too have thought about this for restoring an old rotor. From my automotive experience I remembered what re-surfaced flywheels looked like. If that's the look your after just seek out an automotive machine shop that has a flywheel resurfacing machine. It will be pretty and true as it can be...if they can chuck it properly that it. Just a thought.
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markb

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It looks nice but I don't think that the grinding pattern is like the original. It's more of a swirl or circular pattern instead of radial. Unless I'm mistaken about the original look.
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


bojje

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Hi!
If you look at the restored disc in the topic close to this you can see how my restore looks. It was made with a machine ( I dont know the name in english but translated direct from swedish it might be a rotating magnetoboard with radial working grindstone) to witch I built a extra disc where I can mount the hondadisc to grind the frontside. Backside is easily done as the disc is ”glued” on the magnetoboard. You need to find a machineryshop with that kind of grinder. Unfortunately the company not far from me went bankrobbed so now I do not know where to do it anymore.
Kind regards, Bo from Sweden.


markb

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Yes, that's exactly what I'm looking for. I have a couple of local machine shops to check with. This is a little bit beyond my abilities.
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)