Topic: Discolored Front Brake Rotor

[USN20]

My '74 CB750 front brake rotor is severely discolored to a brownish-blue finish compared to other CB750's I've seen. The PO said that front brake had been dragging in the past and rebuilt the caliper and replaced the pads using OE Honda parts. There's no scoring or squeal present and the brake works just fine.

Can this unsightly discoloration be removed or do I need to replace the rotor?

Thanks!

[gmuse2]

My '74 CB750 front brake rotor is severely discolored to a brownish-blue finish compared to other CB750's I've seen. The PO said that front brake had been dragging in the past and rebuilt the caliper and replaced the pads using OE Honda parts. There's no scoring or squeal present and the brake works just fine.

Can this unsightly discoloration be removed or do I need to replace the rotor?

Thanks!

The discoloration means that the rotor got very hot at one time. Getting it turned should get rid of the surface discoloration, and I would think it would be ok to keep it in service. The mechanic that turns the rotor will have an opinion too.

[crazypj]

just get some 280 grit wet and dry paper, use it wet and sand the disc down until its steel colour, basically you can spin wheel andhold sanding pad against disc. Doing the back is a little more difficult ( dont loose a finger in the spokes )  remove caliper first. wash everyhing with clean water and your good to go. You could try fitting wetordry to old brake pads and spinning wheel but I've never had any luck with that method Turning is a real pain as the stainless gets increadibly hard and will probably havre to remove material to below minimum thickness. If you can get it surface ground its a better option but I know what I would do.
PJ