SOHC.co.uk Forums > CB500/550
Front brake
smoothoperator:
I got this recently from Amazon at £9.48; febi bilstein 23930 Brake Fluid DOT4 Plus. Free delivery on Prime.
K2-K6:
--- Quote from: bobv7 on November 05, 2020, 07:06:59 PM ---Changing the seal but fortunately the piston looks OK. Lot of difference in prices being charged for 1L of brake fluid. ???
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I use silicone grease in the seal area and to push the piston into it's bore. Available from plumbing supplies in small pot for reasonable price.
It's specified from the original 750 workshop manual and works really well. All but impervious to heat, it also has near perfect rejection of water so will best prevent corrosion re-establishing in that area from any moisture around.
These caliper have no weather sealing at all, it's really just down to that grease in provision of some measure of protection.
deltarider:
--- Quote from: Bryanj on November 05, 2020, 05:20:20 PM ---I always warm the caliper before attempting to undo the bleed nipple and use a long 8mm socket with a tee bar so as not to stress it sideways as they snap off very easily
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Most models have the 7mm bleed nipple actually, which means even more caution.
bobv7:
Just finished fitting new seal and bleeding the front brake. New seal £7.00, 1 litre of DOT 4 £5.00 and the level in the bottle has hardly dropped. The rest is destined for recycling as I'm informed it can't be kept 'cos it absorbs water. Anyone need their brakes topped up? >:(
Brian.:
--- Quote from: bobv7 on November 10, 2020, 11:36:15 AM ---Just finished fitting new seal and bleeding the front brake. New seal £7.00, 1 litre of DOT 4 £6.00 and the level in the bottle has hardly dropped. The rest is destined for recycling as I'm informed it can't be kept 'cos it absorbs water. Anyone need their brakes topped up? >:(
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Well...... maybe I've been doing something wrong, but I've used it when it's been in my garage for (probably) two or three years, maybe more, and I have never had a problem with it. I always keep the top on, but yes - never a problem.
It is hygroscopic (if that is the right word) and if you were keeping it in an open bowl then yes, the exposed surface area could absorb a lot of moisture I suppose. But in a capped bottle, I really can't see it being a big deal. Any more than it is in a car or bike master cylinder reservoir.
But that's just me!
I woiuld say that there will be far more knowledgeable opinons than mine that will follow, do be guided by them!
Hope this helps,
Brian.
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