Print Page - B31 Magneto Puller size?

Title: B31 Magneto Puller size?
Post by: Fraz on 28 Jun, 2024, 14:35

Can anyone advise what size and thread pitch, the magneto puller tool needs to be, for a '54 B31 please?

I may already have one that fits, from my vintage moped collection.

Thanks

Title: Re: B31 Magneto Puller size?
Post by: Bigsingle on 28 Jun, 2024, 20:25

Hi , I looked it up and made mine a while back , but just looked this up for you , hope this helps . From British only Austria
Magneto Pinion Puller. BSA. A7. A10. M20. M21. M33. B31. B32. B33. B34. Gold Star.

A7. A10. Sutable for manual advance and retard drive gear.

5/8" OD Thread. 20TPI

Title: Re: B31 Magneto Puller size?
Post by: Roy on 28 Jun, 2024, 20:39

My ones 11/16 x 20 tpi
Roy

Title: Re: B31 Magneto Puller size?
Post by: Bigsingle on 28 Jun, 2024, 21:29

Yes , Roy is correct , I just measured mine ,
11/16 as a decimal is 0.6875
Unable to change my previous post that was copy and pasted from British only, maybe the parts person couldn't read the vernier , I think that is about 17.4mm . Cheers .

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Fraz on 28 Jun, 2024, 14:35