SOLVED: FW #235: AJS E90S, "Porcupine", 500cc DOHC-Twin, 1948

[fromwien]

An easy to solve puzzle for motorcycle-rookies: Make? Engine type? Name? Year?

[fromwien]

Experts?

[sichel]

AJS E90S, "Porcupine", 500cc DOHC-Twin, 1948, ridden by Les Graham, in 1949 first 500cc world-champion on this bike
 
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[fromwien]

Very easy for you, isn't it? Congratulation for your next point!

[fromwien]

Picture attached

[sichel]

Thanks for the point. Yes you are right, one source was enough. I'll add two photos.
First one: Between the camshaft housings, you see where the nickname has its roots.
Second one: The 1952-version, E95. Cylinders raised by 45 degrees and a monumental tank. In my view one of the most beautiful and impressive racing motorcycles. Comes right after BMW RS 54 and Matchless G 50.