Author Topic: Correct C11 tail light?  (Read 209 times)

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Offline Bentaxle

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Correct C11 tail light?
« on: August 01, 2020, 06:07:55 am »
Hi all

The picture below shows the tail light that was on my 1951 C11 when I bought it.  It only had provision for a single filament bulb and I have been unsuccessfully trying to convert it to take a two filament bulb so I can have a stop light.  Unfortunately, the light is not in good condition, with cracks in the plastic, etc.

Does anyone know what is the original light for the 1951 model?  I read somewhere that the Lucas 525 was only used from 1952, and I must say, I prefer the look of the smaller light.

Thanks
Mike

Online Owen

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Re: Correct C11 tail light?
« Reply #1 on: August 01, 2020, 07:41:10 am »
1951-52 used a Lucas 480 which I think is a single filament lamp.  Someone may sell a double filament version?
https://www.draganfly.co.uk/images/shop/14/lamps.jpg
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11

Online timsdad

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Re: Correct C11 tail light?
« Reply #2 on: August 01, 2020, 08:20:28 am »
These sort of single-filament rear lamps can usually be converted by fitting a new bulb holder to take a standard double filament bulb with an offset pin. You can get these bulb holders from a motor factor who sells truck spares or maybe a caravan and trailer spares place.

The bulb holders fit the rubber commercial rear lamps made by Rubbolite and otherr makes. They come in either a plated metal tubular thingy, about 20 mm wide by 30 mm long or fixed to a flat plate about 40 mm diameter, which could be trimmed and modified to fit in a bike lamp.You may have to use a bit of ingenuity, and Araldite, to fit them into your bike rear lamp but it's easy enough.


Ray
Just a motorcyclist.

Online Tman

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Re: Correct C11 tail light?
« Reply #3 on: August 01, 2020, 09:32:37 am »

Online Owen

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Re: Correct C11 tail light?
« Reply #4 on: August 01, 2020, 09:46:36 am »
I used one of those to convert my MT130 to stop & tail.
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11

Offline enfield49

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Re: Correct C11 tail light?
« Reply #5 on: August 01, 2020, 02:53:48 pm »
Use a LED single filament stoplight bulb then put a series resistance in the rear light feed then you only need one wire. Graham

Offline rogerinfrance

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Re: Correct C11 tail light?
« Reply #6 on: August 01, 2020, 05:10:24 pm »
I should not worry too much, the braking ferocity of the C11's brakes will not be too much of a problem to following vehicles, they probably know and will stop long before you have gained your objective. You would be better off buying a pack of post cards to send to the bike to let IT know you have an intention of stopping. What is the braking distance of a C11? If going uphill, the length of the brake cable multiplied by the speed in miles, if going downhill then the bottom of the hill! I was told " dont be a fool, use the 2 second rule" so the speed can be your saviour! Joking aside, mine was not fitted with one but I have fitted the original for 1950 which is MT 111 or 211 or similar. Note be careful, make sure the rear lamp is correct for your model, Either that or go for a much later type including a reflector. Mine was without a reflector and no brake light. I have tried to see how a switch was added but nothing is really correct but the M211 has a dual filament very small head. Finally I am unlikely to ride it at nite on anything resembling a main road.

Offline Bentaxle

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Re: Correct C11 tail light?
« Reply #7 on: August 02, 2020, 01:04:28 am »
Thanks everyone for responding.  Yes the brakes are not exactly ferocious - I was alarmed when first trying them but am now quite fatalistic.