"Robert Swinney" wrote in message
...
(Mean Effective Pressure xLxAxN)/33,000 An Engine that small is almost
without a doubt a 2 stroke.

Bob Swinney

Not if it's a Honda design!

They had 50, 90, and 125 cc single cylinder 4 stroke road bikes.

For racing, they had a five cylinder 125 back in the '60s