SOHC.co.uk Forums > CB750

Front Wheel/ Brake binding?

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ColinHH:
Haha! I just read the response regarding the pivot arm just after I got back from the garage looking at exactly that. The arm wasn’t pushing the fixed pad back. So I used some WD40 on the pivot and put a small spacer between the spring and swing arm. Problem solved! I have already ordered the new piston, seal and pads so won’t do any harm to replace them anyway.

McCabe-Thiele (Ted):
Ideally you need to remove the arm from the pivot and use Copper slip or something similar as the WD40 will only be a short term fix. A decent lubricant that stays in place is needed imho.

ColinHH:
Thanks Ted. Will do as you suggested when I take it to pieces again when fitting the new Piston, seal and pads.

McCabe-Thiele (Ted):

--- Quote from: ColinHH on August 15, 2024, 02:37:39 PM ---Thanks Ted. Will do as you suggested when I take it to pieces again when fitting the new Piston, seal and pads.

--- End quote ---

IIRC there are some small seal rings fitted in the pivot.

Martin6:
Prompted by this discussion, I thought I'd check my front brake pivot (CB750K6), as I'm getting some slight binding and squeal, with a new calliper, fluid and pads. Sure enough, the pivot was not very free. I have managed to significantly improve it, with an hour's worth of Plus Gas and wiggling.

I can see no way of separating the pieces. The top and bottom brackets do not seem to unscrew from each other. They are solidly stuck in the same plane. Is there a technique for separating the two, so I can get to the pivot pin?
This piece: https://www.cmsnl.com/honda-cb750k6-four-england_model14383/pin-caliper-hold_45116323020/ is seized in the top mount (with the two holes to attach to the fork leg) https://www.cmsnl.com/honda-cb750k6-four-england_model14383/joint-caliper_45104317700/

Thanks, Martin

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