12V Sealed Beam Bulb part number

[Teckhardt]

By nortnlvr : ...
" I've gone down this road with the assistance of Dewcatea Bob too, and they didn't fit right. "

_____ Mike had told me he has a wide-case 250Mark-3 (which he had acquired incomplete with parts), so I then assumed that his headlamp-setup was the standard USA-type which were stock with the #4020 sealed-beam bulb. _ But after I had guided him toward the 12-volt version, it was then figured that he must have a European-type headlamp-rim.
(I'd suggest that perhaps you guys might do some parts-swapping.)
___ Besides the Italian & USA versions for headlamp light-bulb set-ups, there was also the British-type of 'sealed-beam' -(which was actually just a non-replaceable bulb mounted within a sealed one-piece lens & reflector unit), plus the British version of the Italian/European set-up (with separately replaceable light-bulb; bulb-holder; lens & reflector).
I've handled 3 (of the possibly 4) different types of headlamp-rims made for fitting each of these different types of lighting set-ups to the common headlamp-shell/bucket.
__ I guess Mike & I never did get just what it is that he has, all straightened-out.
This would be a good thread for us all to show_&_tell exactly what we have for headlighting-mountings -(inside rims), on our DUKEs!

____ As a side-note for those of us with any of the DUKE-models which employed the dim alternator-powered headlights,, I also found within my old-notes, that there was a special sealed-beam made for them... It was numbered: '4036' . _ (I never found one to try-out for myself, however.) _ It was noted to be fully-bright even at low-RPM !


GoodCheers,
DCT-Bob

PS. - Note some additions I made to my previous posting (within this thread).

No idea that there were so many styles. I thought it was either sealed beam or the bulb/holder/reflector type. Both of the shells/rims I have use a sealed beam. The original shell/rim is the Aprilia that came on my SCR. The sealed beam is held to the rim with wire clips. The shell I got off flea-bay (that I will be using on my bike) is a CEV w/ the speedo hole in it. It also uses a sealed beam held to the rim with wire clips. I will try to remember to take some pics of it next time I am out in the shop.

BTW - I now have a total of 3 - 6v sealed beams if anyone needs one. Gonna hang onto one but the other two are up for grabs.

[captpaul]

I bought 2 nice GE 130mm 6v30Watt lo&hi 4020 from Guzzino.com 5 mo ago, and I didn't mind 29.95$ each for American made.

[DewCatTea-Bob]

" No idea that there were so many styles. I thought it was either sealed beam or the bulb/holder/reflector type. "

____ I don't know of any story for why DUCATIs in Great Britain or Canada may have required a different set-up than what was intended for Italy, (like the U.S. did!), and I don't remember where the British-type of sealed-beams came from (to end-up here in the U.S.) but, they were distributed by some big cycle-parts importers such as (but probably not) 'Dixie' & 'Domi Racer',, or maybe it could just be that lots of DUKEs got fitted with such parts by cycle-repair shops, since most DUCATI-dealers were also Brit-bike dealers as well !
__ Is there anybody here from Canada or G.Britain who can enlighten us any further about the subject?


DUKE-Cheers,
-Bob

[Teckhardt]

So here is my collection of bulbs and rings. Both rings are made for SB - they have a clip on the side to index the bulb.

CEV ring with 6v bulb in it. you will notice is in the ring upside down (tab is not in the notch)



Aprilia ring. Also has the indexing tab.



The 6v bulb that was in the CEV shell I got off Ebay. Its a GE 4031 Military Bulb 6v

[Teckhardt]

The two other 6v SB. One is GE one is Wagner. Both list part number 4020.

[Teckhardt]

The 12v sealed beam that I got at the local Harley shop. Some of the Harleys use a 5-3/4" SB. Wagner part number is 4420.

[Teckhardt]

Last is the CEV headlight bulb that goes in the holder/reflector setup. Don't know how I ended up with it since neither of the headlights I have use that setup.

[DewCatTea-Bob]

" The 12v sealed beam that I got at the local Harley shop. Some of the Harleys use a 5-3/4" SB. Wagner part number is 4420. "

____ Very nice report-post Teckhardt!
__ What was that Harley-shop's price for the 4420-S.B.?
And are it's connecting-lugs exactly the same as on your original 6-volt S.B.? - (I had looked-up that SB-# at a web-site, and the description given for that model stated it to have "screw-terminals" , [where-as the #4020 stated "3-prong"].)
____ Now if we could still get some others (such as Eldert) to show_&_tell about any other headlight/rim set-ups which are any different from that which we now have thus far, then that could be even further enlightening!


Happy-Cheers,
-Bob

[Teckhardt]

What was that Harley-shop's price for the 4420-S.B.?

The whopping price of $11.00

And are it's connecting-lugs exactly the same as on your original 6-volt S.B.? - (I had looked-up that SB-# at a web-site, and the description given for that model stated it to have "screw-terminals" , [where-as the #4020 stated "3-prong"].)

The prongs on the back of the bulb are the same as the three 6v SBs that I have. The l _ l config.

[Afro]

I like the part, the set up and the originality of it. I am also amazed with the updates given. I am going to upgrade my beam too.