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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 1946-1950
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What's this?
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Topic: What's this? (Read 1409 times)
Nourish
A's Good Friend
Join Date: Aug 2013
Posts: 249
Karma: 1
What's this?
«
on:
18.01. 2026 17:39 »
Anyone have an idea what this might be? it came with the '47 A7 parts I bought
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Long stroke A7
jhg1958
Valued Contributor
Join Date: Sep 2019
Posts: 369
Karma: 7
The more I learn I realise how little I know
Re: What's this?
«
Reply #1 on:
18.01. 2026 18:44 »
With that thread it looks like a stem from the bottom yolk. But where is the yolk?
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1961 Golden Flash S/Arm
berger
Wise & Enlightened
Join Date: Nov 2017
Posts: 3752
Karma: 24
5oo cafe , berger build norbsa ,
Re: What's this?
«
Reply #2 on:
18.01. 2026 19:36 »
sorry bars open can't help it , the yolk is in the egg
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Nourish
A's Good Friend
Join Date: Aug 2013
Posts: 249
Karma: 1
Re: What's this?
«
Reply #3 on:
18.01. 2026 22:47 »
Sorry - the length is 2 3/4" and the thread diameter is 5/8"
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Long stroke A7
groily
Wise & Enlightened
Join Date: Jul 2007
Posts: 2153
Karma: 33
Re: What's this?
«
Reply #4 on:
19.01. 2026 07:25 »
Good sized lump then! Could it be something relating to a sidecar attachment possibly?
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Bill
Nourish
A's Good Friend
Join Date: Aug 2013
Posts: 249
Karma: 1
Re: What's this?
«
Reply #5 on:
19.01. 2026 10:42 »
It's hollow
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Long stroke A7
jelo68
Moving Up
Join Date: Jun 2023
Posts: 31
Karma: 0
Re: What's this?
«
Reply #6 on:
19.01. 2026 12:19 »
I dont think that it is for Sidecar-mounting cause it is not strong enough.
Mayby for a Wheelspindle/Bearingsleeve.
Greetings Jens
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North Germany 55 A10 plunger
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The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
»
A7 1946-1950
»
What's this?