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royaloilfield
royaloilfield
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Rohan Offline OP
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Does anyone know why there are so many holes for the wiring in a dommie featherbed headlamp shell.

This is the one with the underslung pilot light underneath.
(the pilot light segment is not fitted in this pic)

And the ammeter and headlamp switch are up in the instrument panel.
The speedo is also in the instrument shell up on the handlebars.

I'd wondered it the wiring loom came in - for the headlamp and pilot light only -
- and then came out again the other 'ole for the wiring for the speedo, ammeter and switch.
But then what is that 3rd smaller hole for ??
The speedo is not in the shell, so that rules that out.

I've studied the wiring diagram - but not actually seen a 'proper' loom, I was just going to make
up something to suit - but pondered all these holes ??
The top of this shell is at the top.

[Linked Image from i.postimg.cc]

This is the biggest image I could find online - and it shows about nothing !
There is a lot of wiring and cables around that steering head vicinity.
https://cdn1.mecum.com/auctions/lv0119/lv0119-361989/images/[email protected]

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It seems to me that the pair of obround holes are for the speedo cable to pass through.
"In" at 12 o'clock, and "out" at 4 o'clock.
.. Gregg

Last edited by gREgg-K; 03/02/21 12:23 pm.

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That looks very much like a BSA shell for the first type nacelle.
The large holes are for the speedo cable to pass through. There is a rubber boot which connects the two holes.
The triangular hole is obviously for the under-slung pilot fitting.

Last edited by trevinoz; 03/02/21 8:36 pm.
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Rohan Offline OP
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Hmmm, interesting.
I've never had the whole plot fully assembled, and not considered where the speedo cable might need to run.

Does the BSA shell have a Lucas number stamped into it ?
Does anyone have the shell type for a Norton featherbed Dommie ?
Don't think I've seen that number in print anytime ...

Looks like its SS-7 something on this shell, I'll need to work on it to make it clearer.
700 or similar is a possibility.
Which covers about every model under the sun !?

P.S. The numbers on the shell look to be SS700P/1

And yet here's a SS700P/1 with underslung pilot, no holes and an ammeter up top.
Ay yi yi ...
https://www.picclickimg.com/d/w1600/pict/203231075467_/Genuine-Lucas-7-Headlight-With-Ammeter.jpg

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Rohan,
The part number for the Norton headlight is 51069B and is a SS 700 P/!
SS = side socket
700 = 7" aperture
P = pilot lamp
1 = underslung pilot
No ammeter.
The BSA unit is again SS 700 P/1 having part number 51427A
As far as I know the Norton shell only has the small hole for the wiring, unlike the BSA unit.

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Rohan Offline OP
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Thanks.

Hmmm, finding the 'correct' shell might be a challenge, methinks ?
Maybe I could just put Norbsa decals on the tank.
That'd baffle em !


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