Topic: Who can identify this part?

[75 super sport]

Can anyone tell me what #18 is on the rear caliper? I saved all of my parts from my caliper,  but I do not remember seeing any of those. Is that just the back plate that the brake pad is mounted to?

[Jerry Rxman Griffin aka MuthaF'er]

That's the spring clip that holds the rubber covers on.

If you buy the complete rear caliper rebuild kit from SCI (siriusconinc.com) it comes with those and the rubber covers plus new pistons. Only kit I have found.

[70CB750]

I thought spring clup is 21?

[Jerry Rxman Griffin aka MuthaF'er]

Got me on that. Let me get my parts book out. Back in 5. Not in my Honda parts book. Going to CMSNL to get a better look and part number on their site.

OK, not to worry. Not on our US bikes. Shim.

   Shim,pad
more info >   from serial number: 1020062

 

[75 super sport]

Thanks, I really appreciate your time

[Powderman]

It's a brake pad shim:


The parts books show the pic, but doesn't list the part # in the parts list, obviously no longer available.
http://www.ebay.com/itm/Honda-NOS-CB750-GL1000-1975-77-Pad-Shim-43214-371-006-a9-/251751764761?hash=item3a9d931319:g:MK8AAOSwAL9UiGnA&vxp=mtr

This place has them for $4.75ea.
http://honda.mymcparts.com/a/Honda__/55073597__6246030/REAR-MASTER-CYLINDER@REAR-BRAKE-CALIPER@GEARSHIFT-PEDAL/133920_F13392009.html

[75 super sport]

Thanks a ton, I just ordered some set. How important are these?

[Jerry Rxman Griffin aka MuthaF'er]

They were not used on US models.

"from serial number: 1020062".

1975 CB750F stopped at 1015054
 

[seanbarney41]

Their only known purpose is to dampen vibrations that cause shrieking and squeaking, and apparently, they work, as I omitted the equivalent parts from my F3, and guess what...

[75 super sport]

My serial number is 100003-, but I do not remember ever taking these out.

[Powderman]

My serial number is 100003-, but I do not remember ever taking these out.

I think Jerry meant they started using them from 1020062, 20k units after yours. Did the US models have issues with brake squeal? Maybe the ones that didn't come with them would benefit from having them.

[seanbarney41]

My serial number is 100003-, but I do not remember ever taking these out.

I think Jerry meant they started using them from 1020062, 20k units after yours. Did the US models have issues with brake squeal? Maybe the ones that didn't come with them would benefit from having them.

really?, Powderman, have you ever ridden or even been within half a mile of someone riding any SOHC4?...ummm yeah, the brakes tend to squeal

[Powderman]

My serial number is 100003-, but I do not remember ever taking these out.

I think Jerry meant they started using them from 1020062, 20k units after yours. Did the US models have issues with brake squeal? Maybe the ones that didn't come with them would benefit from having them.

really?, Powderman, have you ever ridden or even been within half a mile of someone riding any SOHC4?...ummm yeah, the brakes tend to squeal

Not lately. When I did it was my brother on his CB and me on my Sportster, he was always behind me so I never heard his over my straight pipes.