First thinvgs I would check ;
1. Bulb
2. Bulb holder - check connections, signs of corrosion etc
3. Switch wiring

Good luck

Do the basics ; 1. Check its seated correctly first. Dont over tighten it they are prone to warping. 2. Take it back off and completely strip it, carb cleaner it and blow it out with compressed air. 3. Check every jet is clear, use a jet cleaner to run through them. 4. Reassemble with new gaskets an...

This might help on both your questions

https://youtu.be/H4o2vkzHzR8

Im not sure any hub and shoes match as perfectly as we would expect
I had the same.
You just need to work the shoes looking for the high spots - ball ache of a job but worth it.
Interestingly i bought a 30 quid hub for the vespa and new ebc shoes......perfect straight away .....

In my formative years with the P range, i found the Haynes manual a great source of help.

a grown up may come along with the correct answer but my understanding was it would have to be re registered if you don't know the registration number For a Classic Scooter that would be correct however as I don't know what a V100 is I cannot confirm to the above. Rich its a small frame Vespa Gaz

Would a domed socket head bolt not do the job ?

So the LCGB as a club ( based on re-election and unanimous backing at the AGM) are happy to support the committee stance. Any non members suggestions that the club is wasting money over this stance is an individual opinion and does not reflect the views of the LCGB membership as a whole. Yep, for t...

I’m interesting in the evidence that members are unhappy that the LCGB are “waisting “ their money. As far as I can see the committee were re-elected by the LCGB members at the AGM- and this means the majority of members are happy with the overall running of the club and the way the committee act. ...

Change the record Johnny.... every man and his dog knows your views about LCGB, so why you feel the need to keep on reminding us at every opportunity beggars understanding. Why not just concentrate on what you enjoy .... and get over the fact that LCGB is not for you...by voting with your feet and l...