The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: Drew Back on 13.03. 2015 19:46

Title: Case swap question
Post by: Drew Back 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..
Title: Re: Case swap question
Post by: muskrat 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
Title: Re: Case swap question
Post by: duTch 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....
Title: Re: Case swap question
Post by: muskrat on 14.03. 2015 11:24
Yep some do, some don't. The 357 was no problem in my plunger cases.
Cheers