Print Page - 1954 BSA B31Plunger parts number

Title: 1954 BSA B31Plunger parts number
Post by: briancairns on 21 Jan, 2026, 12:33

Hi,
I have 1954 BSA B31 plunger ( M20 engine I think).
Does anyone know the part number for the brass bush in the picture? The kick start quadrant fits over this but there is a lot of play which I think is causing kickstart issues.
Thanks in advance

Brian

Title: Re: 1954 BSA B31Plunger parts number
Post by: limeyrob on 21 Jan, 2026, 16:00

It may be 66-3133 but do check that as there are some variations.

Title: Re: 1954 BSA B31Plunger parts number
Post by: briancairns on 21 Jan, 2026, 23:19

Quote from: limeyrob on 21 Jan, 2026, 16:00 It may be 66-3133 but do check that as there are some variations.

Thanks, I think that's the correct number. Just need to try and source one now.
many thanks
Brian

Title: Re: 1954 BSA B31Plunger parts number
Post by: limeyrob on 22 Jan, 2026, 10:06

I did find some, but I didn't like the prices so its worth shopping around.

Title: Re: 1954 BSA B31Plunger parts number
Post by: Janacek on 22 Jan, 2026, 11:20

Looked at the parts diagram on Dragonfly Motorcycles website,and it lists part No 67-3153 for the kickstart bush.
But do check.

Title: Re: 1954 BSA B31Plunger parts number
Post by: Janacek on 22 Jan, 2026, 11:33

Just had another look,and for the earlier gearbox,it lists part number 24-4258.
Looks like you have three part numbers to check.
I have bought from Dragonfly a few times.Good service.

Title: Re: 1954 BSA B31Plunger parts number
Post by: briancairns on 22 Jan, 2026, 14:29

Thnaks all,

Think its definitely 66-3133 as there is a cut out for speedo cable and is brass.
24-4258 is the kickstart spindle bush outer and 67-3153 is bush for outer case

Thanks
Brian

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The BSA Workshop => Singles => Topic started by: briancairns on 21 Jan, 2026, 12:33