Author Topic: Case swap question  (Read 358 times)

Offline Drew Back

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Case swap question
« on: 13.03. 2015 19:46 »
I have an old set of plunger cases(1950)Would I be able to swap all the parts from a 1960 motor to these cases??I have a some what complete later motor but I just love these old plunger bikes I have a lot of welding to do on the old cases They are early ZA10 406..

Offline muskrat

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Re: Case swap question
« Reply #1 on: 13.03. 2015 20:01 »
G'day Drew.
There are only a couple of bits that are different. The cush drive unit is, but will fit on a later crank. Stick with an iron head as the alloy head has a downdraft manifold and the carb won't fit on without major surgery.
I have '57 A7SS internals, barrel & head in my '51 A7 plunger.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7

Offline duTch

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Re: Case swap question
« Reply #2 on: 13.03. 2015 22:49 »

 I managed to do it, if i can- anyone can...!!  '52 BA10

 What Musky said, and some say that depending on which camshaft, it may interfere with the trough casting I have a 357 and no probs, but it (cam) was ground to tidy it up.
 Made an inlet tract extension to fit a 389 mono, but then had to move the battery....
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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Offline muskrat

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Re: Case swap question
« Reply #3 on: 14.03. 2015 11:24 »
Yep some do, some don't. The 357 was no problem in my plunger cases.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7