Rear lamp lens...has no reflector??

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The aluminium reflectors are to reflect the light from the bulb outwards to make the rear light brighter.

The reflector being discussed hear is the build in reflector moulded into the plastic to reflect red light of another light is directed at the lens from the rear.

Does anyone know the intended value of the reflector, in day light you don’t need it, and at night you’ve got you’re lights on. Is it designed for when its parked at the roadside ?
 
The reflector is there for when parked at the roadside at night, but the main reason is for when the vehicle is being driven and the bulb blows
I checked my lens last night and it doesn't have reflective properties...so will be ordering a better quality one from AN or RGM..... That'll teach me from buying one off that certain auction site:mad::mad:
 
If you can be bothered, you should still send it back and / or demand a refund as the part is legally unfit for purpose.
 
The Buckeye Rider said:
The L917 lens on my Norton has a reflector in it. Just a rather stiff piece of aluminum foil forced into place by the curvature and a dab of glue.
The foil came loose once and rubbed on the wires causing a short. Took me a while to find that one.
Click to expand...

Some Lucas L917s have the aluminium sheet while others do not even straight out of the Lucas box.

Only one of the lenses below has it:
Rear lamp lens...has no reflector??



= The one on the right. Edit: That particular lens also has two black foam-rubber pads which rest against the bulb reflector.
Rear lamp lens...has no reflector??


The aluminium sheet is glued in. It's interesting to note that the genuine Lucas L917s without the aluminium sheet (centre) have a tinted flat plastic sheet glued(?) in instead.
The pattern item (on left) the actual reflector is glued (or heat-welded?) in.

Edit: There were two versions of L917 lens, one with red side reflectors (glued), one without.
 
Last edited:
Fast Eddie said:
If you can be bothered, you should still send it back and / or demand a refund as the part is legally unfit for purpose.
Click to expand...

Your not wrong Eddie, and with all this time on my hands I will be sending it back
 
When there’s no foil, just the prisms in the lens, should we call it a refractor, rather than a reflector?
 
I'm just reflecting that buying what looks like a good deal on flee bay isn't always the case...
 
L.A.B. said:
Some Lucas L917s have the aluminium sheet while others do not even straight out of the Lucas box.

Only one of the lenses below has it:
Rear lamp lens...has no reflector??



= The one on the right. Edit: That particular lens also has two black foam-rubber pads which rest against the bulb reflector.
Rear lamp lens...has no reflector??


The aluminium sheet is glued in. It's interesting to note that the genuine Lucas L917s without the aluminium sheet (centre) have a tinted flat plastic sheet glued(?) in instead.
The pattern item (on left) the actual reflector is glued (or heat-welded?) in.

Edit: There were two versions of L917 lens, one with red side reflectors (glued), one without.
Click to expand...
I have one on the shelf without side reflectors. What's the story behind those?
 
850cmndo said:
I have one on the shelf without side reflectors. What's the story behind those?
Click to expand...

I think red side reflectors were not legal in all countries.
The '1973'/Mk2/2A/Mk3 Commando parts books list two variations of L917 tail lamp assembly and lens.

"54584930 Lens".
"54585314 Lens For Italy and Germany" which I assume to be the lens without side reflectors unless anyone knows differently?

The L917 also fitted to Triumphs.
 
I just purchased a new, current production Lucas brand L917 tail light lens on eBay. I am happy to say that the quality looks very good. The red plastic is a nice deep red color and the rear reflector plastic is twice as thick as the cheap aftermarket stuff. It has all of the same markings as the old L917 lens except it does not have the EII markings. This new lens however has a couple of additional markings. On the right hand side of the lens it has a wavy sign followed by K 12482 and the left hand side of the lens DGM 13210 LPX ARLT.

A couple of other differences between the old Lucas and the new Lucas lens is that the new Lucas lens does not have the aluminum reflective sheet metal. Also it does not come with the mounting screws and the rubber sealing washers so you would have to reuse your old ones. The clear window on the bottom for the license plate light has a patch of diffuser ridges in it while the old original lenses do not.

One thing is for sure, this lens is far superior to the other after market junk that is out there and I feel that they are well worth the price.

Peter Joe
 
PeterJoe said:
I just purchased a new, current production Lucas brand L917 tail light lens on eBay. I am happy to say that the quality looks very good. The red plastic is a nice deep red color and the rear reflector plastic is twice as thick as the cheap aftermarket stuff. It has all of the same markings as the old L917 lens except it does not have the EII markings. This new lens however has a couple of additional markings. On the right hand side of the lens it has a wavy sign followed by K 12482 and the left hand side of the lens DGM 13210 LPX ARLT.

A couple of other differences between the old Lucas and the new Lucas lens is that the new Lucas lens does not have the aluminum reflective sheet metal. Also it does not come with the mounting screws and the rubber sealing washers so you would have to reuse your old ones. The clear window on the bottom for the license plate light has a patch of diffuser ridges in it while the old original lenses do not.

One thing is for sure, this lens is far superior to the other after market junk that is out there and I feel that they are well worth the price.

Peter Joe
Click to expand...
After having two tail lights break from accidental knocks on my rider bike, it just makes no sense to pay for a true Lucas brand when there's very little noticeable difference to the pattern types.
 
“Genuine” Lucas L917 & L679 “beehive” lenses are available with all the correct markings..
www.ebay.co.uk

LUCAS L917 REAR LIGHT LENS SUIT 1973 ON TRIUMPH T100 T140 T150 T160 NORTON 850 | eBay UK

THIS IS A LUCAS L917 REAR LIGHT LENS AS FITTED TO NORTON750 AND 850 COMMANDO, AS WELL AS TRIUMPH T100R TR7 T140 T150 AND T160 FROM 1973 ONWARDS. IT IS A MODERN LUCAS REPRODUCTION OF THE ORIGINAL LENS.
www.ebay.co.uk


www.ebay.co.uk

LUCAS L679 REAR LIGHT LENS SUIT BSA A65 NORTON 750 TRIUMPH T100 TR6 T120 1967-73 | eBay UK

THIS IS A LUCAS L679 REAR LIGHT LENS AS FITTED TO NORTON TRIUMPH AND BSA MOTORCYCLES FROM 1967 TO 1973. IT IS A MODERN LUCAS REPRODUCTION OF THE ORIGINAL LENS.
www.ebay.co.uk


that should knock the bottom out of the exorbitant prices I have seen genuine second hand L679 lenses and lamps going for.
 
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