Changing main headlight bulb-access
Post Reply    Forum -> Not-So-Modern
Author Message
Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 5:17 am quote
Hi I used the search and didnít find anything about accessing the bulbs in my headset. I bought this bike in January. Didnít think it had working electrics. I would like to understand the switch protocol too. I just discovered last night a very faint city? Bulb and bottom taillight bulb glowing when the switch position was all the way to the left. In the other 2 position I get no lights at all. I think both main headlight and brake light may be blown. Anyway how do I access the bulbs in the headlight assembly?
Thanks!
The bike is a Ď65 VBB 2T.

A666AF98-2E25-467C-B16E-E3F22B5DE95C.jpeg

Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 5:49 am quote
Another

01E37BD1-0299-4F09-95D9-B19D66F59FC3.jpeg

bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5653
Location: So Cal
Mon Feb 15, 2021 6:10 am quote
The chrome rim is held on by a screw at the bottom and fits into slots at the top of the headset.

Remove the screw, take off the rim, and the headlight assembly should come out.

78CC561A-7A08-4F41-928E-9BF3FF171CD4.jpeg

Member
VBA
Joined: 12 Mar 2018
Posts: 47
Location: Texas
Mon Feb 15, 2021 7:27 am quote
The VBB light switch: Middle position is off. One side is the pilot light and taillight, the other side is the headlight and taillight. Not all models will have the pilot light. The 2 position flap switch controls the high and low beams.

Bulbs: Your bike might have a sealed beam headlight (which means you cannot change out just the bulb for the headlight). You can but aftermarket replacements easily for the whole unit. Your bike is most likely a 6V AC system, which means you need to buy AC bulbs and not DC bulbs. These can be found at your favorite online Vespa store. You will also need to buy the correct wattage for the bulbs.

As with all old Vespa's, there can be variability on what you actually have on the scoot vs what the net says it should have.

If you replace your bulbs and everything works, I will be impressed and happy for you.

In the event that replacing the bulbs does not fix everything, this forum will have lots of info. "VBB electrical" will yield many results that will help you troubleshoot.

Another key element will be to understand "load balanced" electrical systems like the one that is most likely on your bike. Failure to understand how a load balanced system works will lead to frustration.
Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 8:54 am quote
Thank you both for the reply
Sorry for the the upside down pics

This new pic shows the underside of my headlight assembly.

I believe I see a city bulb and another centered bulb. Regarding the bottom; Is it turned and off center and unable to show where the screw heads are or is something else up with it? What do I have to remove to get the trim ring off? Thanks again.

62A85A92-D35C-4A9A-A8B2-00CEC3710F7A.jpeg

Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 8:55 am quote
Another pic

8C40B83A-026A-4A7A-ADC3-5F4A1D92CC8E.jpeg

bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5653
Location: So Cal
Mon Feb 15, 2021 9:53 am quote
Yeah itís on cockeyed. Someone probably jammed it on. If itís the original (with a ďSiemĒ mark) be extra gentle. Replacements are available but they donít make em quite like they used to.
Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 1:01 pm quote
Well nobody ever said the easy way always is the way I do thingsÖ I took the assembly apart and messed with the bulb only to realize that the switch was not in the correct positionÖ I was able to get the headlight to shine.

One thing though the headlight housing had a very brittle white type of plastic gasket around it which totally disintegrated when I was taking it all apart. Is that piece still available? Or a rubber ring so the headlight sits squarely in there without rattling around?Now onto the tail lightÖ The filament doesnít look bad but somehow it doesnít stay in itís housing so I will test the bulb next.

753C3D6B-DDC5-4B13-8249-99D11081DA5C.jpeg

Member
VBA
Joined: 12 Mar 2018
Posts: 47
Location: Texas
Mon Feb 15, 2021 2:05 pm quote
Is this the headlight gasket that you are looking for?

https://www.sip-scootershop.com/en/product/gasket-headlight-lens_57259900?q=Headlight%20lens%20gasket

On my VBA, mine doesn't look like the one linked however I couldn't find that style.
Member
1965 Vespa VBB2T
Joined: 16 Jan 2021
Posts: 21
Location: gladwyne pa
Mon Feb 15, 2021 5:03 pm quote
No mine [/i]was White
Is this what I need? The one u sent?

E5D4716E-05C8-4A1A-8F2E-A81C11620B20.jpeg

Member
VBA
Joined: 12 Mar 2018
Posts: 47
Location: Texas
Tue Feb 16, 2021 10:10 pm quote
Not sure man, things deform over time. Also this may be the solution these days vs what they used to use. I just did a quick google to find a possible solution.
Molto Verboso
bare metal cafe racer
Joined: 01 Sep 2017
Posts: 1084
Location: Aotearoa (New Zealand)
Wed Feb 17, 2021 12:11 am quote
SoCalGuy wrote:
Yeah itís on cockeyed. Someone probably jammed it on. If itís the original (with a ďSiemĒ mark) be extra gentle. Replacements are available but they donít make em quite like they used to.
FWIW the brand new Siem I got from SIP is tops. Same with the replacement rear. Proper chrome goodness.

Only problem I have (which is on the to do list)... is the 12v 35w halogen I put in throws the light too high. Thinking itís because the bulb is probably for a different reflector (?P series) and not sure it can be adjusted. Will have a play at some stage but throwing it out there in case anyone else has already been there done that...
Team Scooter Trash for Petfinder Foundation   DoubleGood Vespa T-Shirts   Yelcome Leather Top Cases and Roll Bags for Piaggio Vespa PX LX LXV GTS GTV
Post Reply    Forum -> Not-So-Modern
[ Time: 0.1480s ][ Queries: 27 (0.0295s) ][ Debug on ]