1981 Rear brake caliper (FLH)

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George Greer
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1981 Rear brake caliper (FLH)

#1

Post by George Greer » Mon Oct 07, 2019 8:14 am

I am curious if this brake caliper and bracket will fit on my bitsa bike.
1981 FLH caliper and bracket.jpg
Looking to see if this will work on my bike. I can find NOS parts to repair/rebuild these here in Europe

IMG_1971.JPG
This is what I have currently installed.


Thanks, George
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RooDog
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Re: 1981 Rear brake caliper (FLH)

#2

Post by RooDog » Mon Oct 07, 2019 1:30 pm

George....
I ran the same 11-1/2" rotor & caliper that you currently have on your bike on my '68 Shovelhead.

I upgraded to a GMA setup with a 5/8 bore master cylinder which gave a better ratio, less pedal pressure, more line pressure, bla, bla, bla....
Spring 1996.04.jpg
I see no reason why the later Harley caliper you pictured would not work for you. Polish or paint it up a bit and you should be happy. You still might put a smaller bore MC on your wish list, just for fun....
....RooDog....
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Re: 1981 Rear brake caliper (FLH)

#3

Post by PanPal » Mon Oct 07, 2019 4:13 pm

Have had a couple of these single piston floating pin calipers give me problems locking up recently, so now considering getting a soft tail 4 piston rear brake and making up a brake stay for my bitsa. I think I was reading this on a shovelhead forum some time back. Just another option.

George Greer
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Re: 1981 Rear brake caliper (FLH)

#4

Post by George Greer » Mon Oct 14, 2019 7:38 am

Fellas,

I went to the Veterama in Mannheim Germany this Saturday looking for stuff....

Just about ready to go home, and decided one last set of parts stands......and ..

Found a NOS Complete caliper, brake shoes ect.... everything was there complete still in the Harley Box!!

Now, the caliper came with a set of springs......but according to the parts manual, I don't see springs in the parts listing, I do see o-rings.

No o-rings in the kit. But no worries there, because I found them as well.

I "think" that the springs would go in-between the two brake pads item number 13 to keep them spread apart, am I correct .....?

Attached a PDF scan of the parts manual page for your viewing pleasure.

George
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Re: 1981 Rear brake caliper (FLH)

#5

Post by RooDog » Mon Oct 14, 2019 1:28 pm

I have no hands-on experience with this caliper, but being that this is a floating caliper I am quite sure that the springs serve as an anti-rattle device and are not critical to the caliper's operation. You may leave them out, or not, macht nix.
....RooDog....
Harley 1981 Rear Brake.01.jpg
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George Greer
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Re: 1981 Rear brake caliper (FLH)

#6

Post by George Greer » Mon Oct 14, 2019 2:17 pm

Roodog,

I am going to put them in, and in-between the pads.

Just to keep everything together so I won't misplace any parts, because I know that I will be able to misplace them.

Thanks for the input.

George

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Re: 1981 Rear brake caliper (FLH)

#7

Post by RooDog » Mon Oct 14, 2019 2:55 pm

George Greer wrote:
Mon Oct 14, 2019 2:17 pm
Roodog,

I am going to put them in, and in-between the pads.

Just to keep everything together so I won't misplace any parts, because I know that I will be able to misplace them.

Thanks for the input.

George
Just be sure the springs don't bottom out when the pads wear down....

Misplaced parts? I am very familiar with that one. I spend a lot of shop time looking for something I had just had in hand a minute or two ago. I think my shop monkey grabs 'em and moves the parts when I'm not looking. I'll strangle that wraskly munkey if I can ever catch him.... LOL...
RD....

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Re: 1981 Rear brake caliper (FLH)

#8

Post by Andygears » Tue Oct 15, 2019 12:10 am

Caution is good especially with brakes.

I may be all wet but.... I seem to recall seeing a brake caliper and bracket like that at the swap meets I frequent with a quite thick rotor with a radial groove around the outside with a spring in it. Early 80’s.

Before I spoke I consulted the V-twin catalog (for what it’s worth). And I found 2 listings for: get this, 12 inch rotors.
HD #40939-79A for 79-85 FLT and also HD#40909-81A for 1981-84 FLH .390 thick. Both are replaced by V-twin 23-0313. So whether your 11 1/2 rotor will work may be questionable, and/or will the pistons be too far out with the thinner rotor?

So I saw a guy one day with a 11 1/2 Y-bracket and a 10 inch rotor, he was alive so I guess it worked.

Be safe
Andygears

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