SOHC.co.uk Forums > CB750

Front brake pads

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Oddjob:
Worth checking that the caliper is mounted properly. The amount of 500/550s calipers I saw with the mudguard stay mounted UNDER the caliper mount was insane, this meant the caliper sat lobsided and the brakes were spongy and ineffective until the pads started to wear at an angle. The 750 uses the same type system so I'd imagine the same mistake can be made.

Martin6:
Yes it can also be the case on a 750. I refurbished my front end, forks seals etc. and
- braided hoses (HEL)
- replacement calliper (David Silver)
- pads
- brake fluid all properly bled, no air
- new calliper arm hinge pin and o-ring, + greased
I reassembled, copying the way it was and then noticed the mudguard stay was between the calliper arm mount and fork. I'd been riding it like that. Obviously, I then put it right.

I still find it requires quite a lever pull to get serious braking.

Yesterday, I was a sensible distance behind a van. It suddenly started to get much closer. Brake lights were defective. I needed a hard pull, but I did stop pretty quickly. From that experience, Id say they do work well enough, they just don't have the 'feel' to give much confidence.

Oddjob:
Feel can often be about pad material, too hard and it feels wooden. Organic is normally the best for feel but suffers with dust and quick wear and of course brake fade if used very hard. Sintered are good but can be hard on the discs, still a dust problem though. I'm going to try some carbon pads next, got them on my 1300 and they are great, almost no dust, stop like hell and are kinder to the disc than sintered.

Have you bedded the pads in and removed the old bedding from the disc surface? Makes a hell of a difference if done correctly.

Pauarc:
I change mine to twin disc brakes are much better

K2-K6:

--- Quote from: Pauarc on May 14, 2025, 08:39:17 AM ---I change mine to twin disc brakes are much better

--- End quote ---

They do work really well with twin setup, don't they.

It does though have more to do with hydraulic ratio of master to caliper ratio than absolute disc swept area.

Honda used originally very conservative ratio for them, to make them most linear and not too grabby .... of which views have now significantly shifted.

A different, smaller, master cylinder bore will be as effective for brake feel and what is interpretation of "power" to rider.

More pad and disc surface will predominantly give better performance to fade & repeated abilities to dissipate energy at the extremes of use, generally unlikely the way these are ridden nowadays.

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