BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Mieszko on 17 Feb, 2025, 08:20

Title: Light Switch Repair
Post by: Mieszko on 17 Feb, 2025, 08:20
Hi, I need help acquiring a light switch part for an A7 from 1961. The part in question is a plastic element which I have marked in the picture below. Unfortunately, the thread has been stripped in this element (visible in the photo). Where can I buy this part? I know that the entire part is available for purchase (https://draganfly.co.uk/shop/58841/ign-switch/#19-1666) but I don't want to buy the whole switch because then it won't be an original part, and that's important to me. Do you have any tried and tested ideas to fix this? Can you help?
Zdjęcie WhatsApp 2025-02-17 o 09.14.52_74dca369.jpg
Title: Re: Light Switch Repair
Post by: iansoady on 17 Feb, 2025, 10:34
Is there enough meat to cut a smaller diameter thread - even a metric one if your finer feelings allow?
Title: Re: Light Switch Repair
Post by: idie on 17 Feb, 2025, 11:43
Try using something like JB weld on the worn area. Grease the inside of the piece that screws on. Leave to set then unscrew the two pieces. This should leave you with a new bit. of thread..
Title: Re: Light Switch Repair
Post by: DAVE BRADY on 17 Feb, 2025, 11:46
Hi,

What is the bit that screws on like? Is that tread worn and what is it made of?

Dave.
Title: Re: Light Switch Repair
Post by: Mieszko on 17 Feb, 2025, 13:39
Quote from: iansoady on 17 Feb, 2025, 10:34 Is there enough meat to cut a smaller diameter thread - even a metric one if your finer feelings allow?
Hi iansoady,
There is enough meat to cut a smaller diameter thread but then we need thin nut, because from the top comes the switch lever. I don't know if I will find such a cap...
Title: Re: Light Switch Repair
Post by: Mieszko on 17 Feb, 2025, 13:41
Quote from: idie on 17 Feb, 2025, 11:43 Try using something like JB weld on the worn area. Grease the inside of the piece that screws on. Leave to set then unscrew the two pieces. This should leave you with a new bit. of thread..
The clearance between the nut and the thread is approximately 1 mm. There is no thread at all. The previous owner already glued it to a similar thread, but unfortunately it doesn't hold.
Title: Re: Light Switch Repair
Post by: Mieszko on 17 Feb, 2025, 13:42
Quote from: DAVE BRADY on 17 Feb, 2025, 11:46 Hi,

What is the bit that screws on like? Is that tread worn and what is it made of?

Dave.
This is plastic element. There is no old thread at all.
Title: Re: Light Switch Repair
Post by: DAVE BRADY on 18 Feb, 2025, 08:42
Hi,

Is there enough plastic to cut a new very slightly smaller diameter thread on the piece in the picture and open up the other part and make a very thin sleeve to fit between them?

Dave.
Title: Re: Light Switch Repair
Post by: Mieszko on 18 Feb, 2025, 11:03
Quote from: DAVE BRADY on 18 Feb, 2025, 08:42 Hi,

Is there enough plastic to cut a new very slightly smaller diameter thread on the piece in the picture and open up the other part and make a very thin sleeve to fit between them?

Dave.
Hi,
I will check it at Thursday and will back with info.
Mieszko