Author Topic: Lucas brake light switch on a 1953 BSA A7 plunger  (Read 488 times)

Offline OldSwede

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I have a problem with this switch. Should it be fitted with just one clip on the lower frame tube?
I  purchased the used switch online and it was just the switch not the fitting details, as I see it they will be easy to make.
Lucas No. 31281
BSA No. 19-1106

I can´t get the attachment to function, cant see it in the preview, but here is a picture  www.fenrisulven.ownit.name


Online Greybeard

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #1 on: 21.05. 2018 15:20 »
Mine is attached with one 'P' clip. There will not be much force put on the switch so should be fine. I'm away from home until tomorrow; if you want a picture of my switch after that, just ask.

Offline OldSwede

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #2 on: 21.05. 2018 15:31 »
Mine is attached with one 'P' clip. There will not be much force put on the switch so should be fine. I'm away from home until tomorrow; if you want a picture of my switch after that, just ask.

Yes please, Greybeard. I will be thankful if you send me a picture.

Lars

Online bsa-bill

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #3 on: 21.05. 2018 17:08 »
some movement is desirable as the foot brake pedal moves in a slight arc, can be a fiddle to get right
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #4 on: 22.05. 2018 14:12 »
This is how I've attached the brake switch on my '55 Plunger. I made a stainless steel 'P' clip for the switch. I chose not to use the normal spring as the operating connection as I couldn't see any point and it looks ugly. I've used a piece of thin brazing rod which is held on the brake rod with a small aluminium 'P' clip, (designed for clipping cables to walls but bent to a P). I hope this helps.

Online Triton Thrasher

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #5 on: 22.05. 2018 15:55 »
I think the spring would work better for longer than that wire.

Online Greybeard

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #6 on: 22.05. 2018 20:14 »
I think the spring would work better for longer than that wire.

It's been on there for five years without any trouble. The rod has the additional feature of pushing the switch back as well as pulling it. (I guess a coil-bound spring would do that)

Offline OldSwede

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #7 on: 26.05. 2018 17:49 »
Thank you Greybeard. I´ll  fabricate a fastener like yours and paint it in Maroon.


Offline OldSwede

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #8 on: 30.05. 2018 15:53 »
Now my switch is in place! It is made by the OEM-company and stamped 3  53 and 31281, Lucas and made in England. I´m of course very proud to be the happy owner.

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Re: Lucas brake light switch on a 1953 BSA A7 plunger
« Reply #9 on: 30.05. 2018 17:41 »
Now my switch is in place! It is made by the OEM-company and stamped 3  53 and 31281, Lucas and made in England. I´m of course very proud to be the happy owner.
That looks just like the BSA drawing.  *smile* (Except not exploded, natch)