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Author Topic: BSA SINGLE HELP  (Read 5459 times)

Offline stagevi

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BSA SINGLE HELP
« on: February 09, 2006, 06:45:44 AM »
i am rebuilding a BSA single and would like to know if it is a 350 or 500cc.  the serial # on the case is ZB 34 GS 2164.  

any other info would be greatly appreciated.  thanks.
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Offline L.A.B.

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Re: BSA SINGLE HELP
« Reply #1 on: February 09, 2006, 07:07:51 AM »
 ZB34GS = 500cc Gold Star, 2164 = from the 1950 model year.

If you are rebuilding it then the bore and stroke measurements (85 x 88mm) should confirm this?
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Offline stagevi

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Re: BSA SINGLE HELP
« Reply #2 on: February 09, 2006, 07:36:28 AM »
what carburetor should i use with it?  i have a few monoblocs around but i am unsure of the sizes.  what size do you recommend?  thanks.
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Offline L.A.B.

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Re: BSA SINGLE HELP
« Reply #3 on: February 09, 2006, 07:39:40 AM »
Nigel (Vintagebike) can possibly give you more Gold Star info?
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Offline VintageBike

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Re: BSA SINGLE HELP
« Reply #4 on: February 09, 2006, 05:09:39 PM »
The best info I can find were the recommended B34 Monobloc settings:

Choke 1 -1/8
Main Jet - 240
Throttle Valve - 389/3
Needle Position 2
Needle Jet - .1065

Probably a good starting point anyhow.
Cheers

Nigel.

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