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Title: Plug
Post by: spike123 on 28 Jun, 2022, 03:14

Hi does anyone know what the thread and size tap needed for the sludge trap plug on 1967 bsa a65

Title: Re: Plug
Post by: Spaceman on 28 Jun, 2022, 06:10

According to British Bike Bits it is 3/8" BSC X 1 1/2":

https://www.britishbikebits.com/flywheel-bolt-bsa-a50-a65-1964-72

Title: Re: Plug
Post by: DAVE BRADY on 28 Jun, 2022, 07:11

Hi,

Attached is screenshot from Feked site. This has BSF and is for the earlier models so most likely for your crank is a UNC thread as mentioned on other sites.

Dave.

Just had a look on SRM site and they have the thread as BSF from '66 on. So a bit confusing as usual with some BSA specs.

Title: Re: Plug
Post by: Spaceman on 28 Jun, 2022, 09:29

Sorry - looking at the wrong flywheel part ::)

Title: Re: Plug
Post by: JulianS on 28 Jun, 2022, 10:24

7/8 inch x 20tpi.

Title: Re: Plug
Post by: spike123 on 28 Jun, 2022, 10:42

Thanks. Guys

BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: spike123 on 28 Jun, 2022, 03:14