Bolt thread size

Started by courtney, 24 Jul, 2021, 12:03

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courtney

24 Jul, 2021, 12:03
Hello,

Hoping someone can assist. What's the thread size of the bolt that holds on the auto advance unit on a 1965 C15, please? It's not on the parts list online to find the size.

Please and thank you.
1965 BSA C15
1970 BSA B25 (US spec.)
2004 Aprilia Tuono

Ian C

#1
24 Jul, 2021, 12:24
Assuming sidepoints? As far as I can make out, BSA part no. 76-0290 was 1/4" x 26tpi x 2 1/4"long .  HTH

courtney

#2
24 Jul, 2021, 13:13
Thanks. It's side points. Is it UNF?
1965 BSA C15
1970 BSA B25 (US spec.)
2004 Aprilia Tuono

Ian C

#3
24 Jul, 2021, 14:07
Its Cycle thread (26tpi).  1/4" UNF is 28tpi.   

courtney

#4
24 Jul, 2021, 14:17
Many thanks for your help. It's greatly appreciated.
1965 BSA C15
1970 BSA B25 (US spec.)
2004 Aprilia Tuono

Ian C

#5
24 Jul, 2021, 15:55
No problem.. Glad to be of help.  :)
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