SOHC.co.uk Forums > CB500/550

Front brake - light switch query

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andy120t:
Good thought - I had been wondering if there was a way of applying air pressure to do that. I suppose the question would remain - how much pressure...but it can't get too much? But at least it would check that any internal circuit was ok before I fill it up with fluid again.

TrickyMicky:

--- Quote from: andy120t on November 06, 2025, 04:42:37 PM ---New switch?
- if the old one still works I won't need to replace it.
- the old one looks a lot nicer than a shiny new one.
- not to mention the cost, plus the tax I would have to pay for a new one...!

I was trying it fairly gently with a spanner, but I'll give it a good soak for a while then try with a socket.

--- End quote ---
If the old one still works, why do you want to remove it?  New one from DSS is £18 inc vat, plus postage.

Ken4004:
My switch was a little sticky on the first push but after a couple of pushes it loosened up, probably about a pound or two of force not very much at all really.
You will get a feel for it once you start to push, the way I looked at it if you can’t get it moving your buying a new switch anyway but it really wasn’t a problem.
I also had trouble loosening off the switch but as said earlier used a socket and left the manifold bolted to the bike while I loosened it off but it wasn’t that bad with the correct socket, like anything on the bike just take your time and you will get it off good luck.

andy120t:
I've safely removed the switch. I've pressed with a drill bit and it's now loose and moving a few milimetres, but I'm not getting continuity which is a shame. I might need a new switch after all. I can't think why it wouldn't work though unless the connectors have corroded inside.

Ken4004:
As a last resort you could try leaving it to soak in switch cleaner but really for the price of a new switch it’s probably not worth d see pending any more time on it , I am sure you have many other things that need to be looked at .

I would probably be inclined to take it apart to see what’s inside but that would involve destroying the switch for good but would be interesting just depends on how much time you have on your hands and how inquisitive you are.

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