SOHC.co.uk Forums > CB750
CB750F1 Rear Disc Brake
Doswen:
--- Quote from: Moorey on October 09, 2020, 06:00:41 PM ---
--- Quote from: Doswen on October 09, 2020, 05:18:29 PM ---
--- Quote from: Moorey on October 09, 2020, 04:08:48 PM ---
Is it a F1 seal kit as they can be very hard to find now.
--- End quote ---
Dave, it is an F1 and yes the kit was difficult to find in the UK. I had to order the GL1000 kit From the USA and cut down the plunger thread. The kit is otherwise identical but I have also tried another set of seals from another F1 master cylinder and it’s no different. Still locks up under load.
--- End quote ---
No idea how much you cut off the plunger thread but i had to cut 6mm off the GL plunger and it worked fine.
--- End quote ---
I matched the thread length to the original.
Bryanj:
Also classic of hardened crap in the caliper seal groove.
Ive had them where a dremel brush just polishes the crud, you need to use a dental pick and change the seal
K2-K6:
If you put a clamp on one piston and squeeze it backwards into it's bore, then does the other piston come out, or does the fluid come back into the reservoir?
Doswen:
--- Quote from: Bryanj on October 09, 2020, 06:38:41 PM ---Also classic of hardened crap in the caliper seal groove.
Ive had them where a dremel brush just polishes the crud, you need to use a dental pick and change the seal
--- End quote ---
Yes was cleaned out with a pick and yes had new seals. The seal isn’t leaking. Also fitted another rebuilt caliper also with new seal and had the same problem.
So I don’t think the caliper is the culprit but I don’t know what is.
Doswen:
--- Quote from: K2-K6 on October 09, 2020, 06:44:33 PM ---If you put a clamp on one piston and squeeze it backwards into it's bore, then does the other piston come out, or does the fluid come back into the reservoir?
--- End quote ---
Neither piston will noticeably push back. I have to open the bleed valve to get them to move.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version