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Author Topic: Identifying calipers on CB750K Four 1977  (Read 486 times)

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Offline steve_K8_CB750

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Identifying calipers on CB750K Four 1977
« on: March 28, 2020, 06:23:30 AM »
Hi All,

Thanks to everyone for the amazing information on this forum. I've been using it for almost two years now and have learned so much, so a huge thank you.

I have a set of Nissin calipers on my CB750K Four 1977 which I'm having trouble identifying. The bike has been modded by previous owners and has dual discs up front. The clippers are Nissin and the only markings or numbers I can read from the calipers don't find any parts on websites or parts databases I've tried. I'm searching for rebuild kits for these, any help or guidance anyone may have for me would be much appreciated. I've added some photos of the calipers below.

https://drive.google.com/file/d/17QbUOyuso8558-QXdln1rqf2w_gZp41D/view?usp=sharing

https://drive.google.com/file/d/1KiXZJERyvtkwFWA7V2p2QGJqBU7LJ4ax/view?usp=sharing

https://drive.google.com/file/d/16Myx739FQJqyzeyKlaZXDRDVf2qiY6B1/view?usp=sharing

https://drive.google.com/file/d/1PfbUrEpYxTvRAB1Td5QUQhKcqJpUK7ps/view?usp=sharing

https://drive.google.com/file/d/11oJ144meBKXNqgvA-sL_uuzoznJgBe3I/view?usp=sharing

https://drive.google.com/file/d/1YeIM9JHkGxmLBlpxXaTzg-mmx3wMu71P/view?usp=sharing

https://drive.google.com/file/d/16ZC37PIQlJyrG-8J6vFwcLr2PHzQYzfj/view?usp=sharing

Thanks for your help
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Offline bryanj

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Re: Identifying calipers on CB750K Four 1977
« Reply #1 on: March 28, 2020, 07:15:33 AM »
Look a bit like GL1000, what is the piston diameter?
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline steve_K8_CB750

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Re: Identifying calipers on CB750K Four 1977
« Reply #2 on: March 28, 2020, 09:02:21 AM »
Thanks for your help. The piston diameter is 38mm.
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Online Don R

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Re: Identifying calipers on CB750K Four 1977
« Reply #3 on: March 28, 2020, 09:18:42 AM »
 That's a clue, I was surprised when doing the double piston caliper swap how many honda models use the same brake bracket and caliper. Those look like the gl1000 brackets but when you look up the part number it shows a crossover list and fits many models. For example, on my gl1000 I used 1100 magna brackets with Sabre 32mm dual piston calipers.
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Offline bryanj

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Re: Identifying calipers on CB750K Four 1977
« Reply #4 on: March 28, 2020, 09:32:40 AM »
From memory 38mm is GL 1000. That piston looks wrong though, i dont remember an extra groove

Got a pair to strip out but not allowed to do much at moment!!!

EDIT

just looked on ebay and yes the groove should be there, forgot about the dust seal that goes on the outer
« Last Edit: March 28, 2020, 09:38:46 AM by bryanj »
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline fxef79

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Re: Identifying calipers on CB750K Four 1977
« Reply #5 on: March 28, 2020, 10:41:51 AM »
Looks like 77/78 CB750F brakes.
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Offline fxef79

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Re: Identifying calipers on CB750K Four 1977
« Reply #6 on: March 28, 2020, 10:43:12 AM »
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Offline fxef79

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Re: Identifying calipers on CB750K Four 1977
« Reply #7 on: March 28, 2020, 10:51:43 AM »
My trike has a 77 or 78 CB750F whole front end.
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Offline steve_K8_CB750

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Re: Identifying calipers on CB750K Four 1977
« Reply #8 on: March 28, 2020, 03:00:27 PM »
You are all legends! Thanks very much for your help. I searched the GL1000 calipers and they look like the right ones. Also @fxef79, thanks for the pics of the caliper from your trike, I found a video which I think which seems to suggest the GL1000 and the SOHC CB750F may share the same calipers.

Thanks again for your help, very much appreciated!
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Offline fxef79

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Re: Identifying calipers on CB750K Four 1977
« Reply #9 on: March 29, 2020, 01:17:43 PM »
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