Print Page - clutch, complete, for BSA JB22 empire star, 250cc single.

Title: clutch, complete, for BSA JB22 empire star, 250cc single.
Post by: eddielives on 25 Jun, 2022, 07:46

I HAVE A JB22 EMPIRE STAR WITHOUT A CLUTCH. THEY ONLY RAN FROM 37 TO39 THEN THE WAR STOPPED PRODUCTION TRYING TO FIND OUT IF THEY RAN A STAND ALONE CLUTCH OR IF THERE IS AN INTERCHANGABLE CLUTCH USED IN MULTIPLE MODELS
THANKS
CAIN

Title: Re: clutch, complete, for BSA JB22 empire star, 250cc single.
Post by: Y13 Alan G on 25 Jun, 2022, 15:20

I do not know model J22. The Empire Star was M 23 single port OHV 496 cc. As far as I know the clutch was the large multiplate dry type as fitted to the Y 23 & G 14. Hope this helps

Title: Re: clutch, complete, for BSA JB22 empire star, 250cc single.
Post by: Rupert on 25 Jun, 2022, 15:49

As far as I can tell the C10/C11 6 spring clutch, pre and post war is the same item and will fit the pre war B series gearbox as on your 1938 JB22. The only significant part which I believe to be different is the splined centre with the internal tapered hole which fits on the gearbox mainshaft, that part on the C clutch doesn't have the spigot on its inner face to accept the scroll sleeve which the B item does. I believe the post war B range splined centre used 1946-48 is the same as the pre war B item.
If you can find one of them (not easy) and put it into a C range single plate clutch (plenty about) that should work.

Title: Re: clutch, complete, for BSA JB22 empire star, 250cc single.
Post by: eddielives on 27 Jun, 2022, 06:21

thanks for the input, I'll start looking
Cain

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The BSA Workshop => Pre War => Topic started by: eddielives on 25 Jun, 2022, 07:46