Author Topic: ZA7/ZA7S Crankases Wanted  (Read 204 times)

Offline zurferjoe

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ZA7/ZA7S Crankases Wanted
« on: 24.07. 2019 13:25 »
Hi Bezza people ,I have bought a 1949 BSA 500 twin with a set of cases from 1950 ZA10 ,anyone got a set of cases ZA7 / ZA7S for sale , or maybe swap for my 50s cases? There in good condition .Hope you can help thank you Harry
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Online bikerjohndavies

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Re: ZA7/ZA7S Crankases Wanted
« Reply #1 on: 25.07. 2019 07:49 »
The cases for a 1949 ZA7 would be for the earlier long stroke motor which is different to the 1950 A10 and later short stroke A7 so you would have to change a lot more that just swap the crank cases over.
1937 Panther M100 Rigid, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10SF (WIP), 1958 BSA C15, 1961 Triumph T120R

Online Swarfcut

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Re: ZA7/ZA7S Crankases Wanted
« Reply #2 on: 25.07. 2019 09:01 »
To be clear, do you need Longstroke Cases to fit Longstoke Internals, or do you have early A7 Shortstroke Internals but only a set of  A10 stamped cases?

 Swarfy.

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Re: ZA7/ZA7S Crankases Wanted
« Reply #3 on: 25.07. 2019 09:03 »
 Harry, I'm no expert but unless you know the bikes history, it may be possible that the frame left the factory as an early '50 model A10...but depends what you want I guess.... I'm sure others more knowledgeable will clear it up  *dunno*

 Edit- is it a rigid or Plunger ?

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Offline jfligg

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Re: ZA7/ZA7S Crankases Wanted
« Reply #4 on: 12.09. 2019 03:30 »
Hell the long stroke disign was changed half way through 1950. My 49 has 1950 cases, but i also have the original cases.  Let me have a look to see if I have and extras.  Jeff

Offline Klaus

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Re: ZA7/ZA7S Crankases Wanted
« Reply #5 on: 12.09. 2019 21:25 »
Hello Harry,

have a look at here, there are also other ZA7 Parts.
https://www.ebay.de/itm/BSA-A7-1947-CRANK-CASES-719BP123/264456605779?hash=item3d92d79053:g:-HQAAOSwlYVdSydy

cheers Klaus


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Re: ZA7/ZA7S Crankases Wanted
« Reply #6 on: 13.09. 2019 08:34 »
Klaus..   That eBay listing is interesting in that the vendor is making the classic mistake of confusing rarity with desirability.  Longstrokes are Rare, certainly. Desirable? Not really, as the design is flawed, so only if you are desperate, or foolish enough to consider that represents a good buy.  I don't think there will be a rush. In a similar  manner,  how anyone can be prepared to spend £100 on a plunger stand beats me. Or is it me, Grade A Skinflint, who has it wrong?  Sliggo's recent post on values and trends made interesting reading. But then I look on old bikes as simply a hobby.

 Swarfy.