Re: 1954 100cc Hudson Motorised bike
That is too cool. I wish I had that black one in the center photo setting in my garage right now...what a great project. As for the displacement, the cylinder fins can be deceiving. Our little Chinese 2 stroke motors have very deep fins for good cooling. Look at one from the side and you'll see just how small the cylinder actually is. The motor on the bikes in your post might be 100cc but with less fin area. Hard to tell cubic inces from a picture. I wouldn't care if it was only 50cc, I'd still like to have one.
Thanks for sharing.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"