A7 500 to 650cc

[Jean-Luc]

is it possible to convert a 1953 A7  to 650cc ?
If so , is it "easy" ? and what are the parts to be found ?

I wish to keep the original engine cases .

Thanks !

[idie]

You can keep the cases and timing gear and oil pump. You will need a new crankshaft barrels pistons con rods head and push rods. As the barrels are one fin taller you may need new exhaust pipes.

[Jean-Luc]

Thank you very much !

How many fins for an A10 ?
I am unsure of my new 1953  A7  capacity ...
She has  8 barrel fins .