bsaownersclub.co.uk
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
Help
Search
Login
Register
BSA Owners' Club Forum
»
The BSA Workshop
»
Twins
»
1971 OIF Thread.
« previous
next »
Print
Pages: [
1
]
Author
Topic: 1971 OIF Thread. (Read 1332 times)
0 Members and 1 Guest are viewing this topic.
A10 JWO
Golden Flash
Posts: 909
1971 OIF Thread.
«
on:
19 January, 2018, 16:54:40 »
Every thread on my A65 is shown as Uni-thread. However the oil feed pipe is held on with a 5/16" Whitworth bolt according to my parts list..21-1973. Can anyone confirm please.
Logged
AWJDThumper
Empire Star
Posts: 881
Dandy Beagle D14 C15 B40 B40WD B44 B25 B50 A10 A65
Re: 1971 OIF Thread.
«
Reply #1 on:
19 January, 2018, 17:18:13 »
My 1971 parts book shows it as 21-1973 5/16" UNC!
Logged
A10 JWO
Golden Flash
Posts: 909
Re: 1971 OIF Thread.
«
Reply #2 on:
19 January, 2018, 17:54:11 »
I have looked at Dragonflys list and they claim it is Whitworth
. Don't want to damage anything. Will test both gingerly. Thanks for response.
Logged
AWJDThumper
Empire Star
Posts: 881
Dandy Beagle D14 C15 B40 B40WD B44 B25 B50 A10 A65
Re: 1971 OIF Thread.
«
Reply #3 on:
19 January, 2018, 18:55:56 »
It's been 5/16 since at least 1969 when BSA changed to unified threads - Dragonfly are simply wrong! Also, both 5/16 BSW and 5/16 UNC are 18 tpi and therefore, to all intents and purposes, identical.
Logged
A10 JWO
Golden Flash
Posts: 909
Re: 1971 OIF Thread.
«
Reply #4 on:
21 January, 2018, 17:45:25 »
Thanks Thumper.
Logged
Print
Pages: [
1
]
« previous
next »
BSA Owners' Club Forum
»
The BSA Workshop
»
Twins
»
1971 OIF Thread.