Author Topic: New front caliper build pinching rotor  (Read 2278 times)

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Offline ryanGDanderson

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Re: New front caliper build pinching rotor
« Reply #25 on: July 11, 2022, 01:48:11 PM »
Did you by any chance swap the left and right puck?

The non stationairy puck has the dimple to fix the plastic ring. The stationairy one should however have an extension to fix it.


I think Remcod may be onto something here, the stationary pad should have the hole in it. The cotter pin goes through the pad to the stationary calliper. Have you reversed them? (I've never tried reversing them, but it may be possible).

Thank you both for the information! The pads are on the correct sides :). Cotter pin on one side, piston seat on the other. Unless I’m missing something?

Offline david 750f

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Re: New front caliper build pinching rotor
« Reply #26 on: July 11, 2022, 01:53:55 PM »
Here is a pic of what OEM pads look like. Is your stationary pad thicker than this?

https://www.cmsnl.com/honda-cb750f-750-super-sport-1975-usa_model493/brakepad-set_00000kit0621/
1976 CB 750F

Offline ryanGDanderson

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Re: New front caliper build pinching rotor
« Reply #27 on: July 11, 2022, 02:07:04 PM »
Here is a pic of what OEM pads look like. Is your stationary pad thicker than this?

https://www.cmsnl.com/honda-cb750f-750-super-sport-1975-usa_model493/brakepad-set_00000kit0621/

That puck is certainly thinner than the one I had received. Looks like the problem has been solved?

Online Don R

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Re: New front caliper build pinching rotor
« Reply #28 on: July 11, 2022, 02:57:45 PM »
 Just a crazy thought, could the thick and thin pucks be reversed?
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Offline grcamna2

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Re: New front caliper build pinching rotor
« Reply #29 on: July 11, 2022, 04:37:16 PM »
In the picture of you holding the fixed side of the caliper/pad, the pad material looks much too thick. It also appears not to be seated, down in the caliper. What’s the brown stuff between the pad and caliper? Scrape the paint off the metal backing plate and make sure that pad is seated properly.
I think the brown/reddish stuff may be anti-squeal disc brake goo.
I’m pretty sure that pad is wrong

Both correct. Red stuff is anti-squeak. The puck is very thick and not flush with caliper. I didn’t take a pic of the puck’s back but it has a small, off-center hump causing the gap.

The non-stationary 'piston side' pad is the one that does all the work and it usually wears twice as much as the stationary pad,from what I've experienced:therefore removing some friction material from it will help clearance.
Does the caliper freely pivot from side to side on its mounting post ?

Why not take the stationary pad and apply it to a belt sander:there's still plenty on there.
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