Honda’s amazing miniature engine race bikes

[Mailman]

The absolutely stunning 6 cyl. 250cc , RC166

The twin cylinder 20,000 rpm 50cc. RC116

 

[Jim]

I've always been a fan of the little Honda racing motors. It still amazes me the revs they get out of 'em.

 

[JAX71224]

When I lived in Madison, I knew an older rider that had one of those 250cc 6 cylinder bikes! Wonder what happened to that one, for the owner would have to be around a hundred years old now if still alive.............He ran a body shop and it was in an attic to the shop!

 

[59Tebo]

I wonder what the engineering theory was with so many cylinders, and such small displacement? And, four valves per cylinder? All I can think of is volumetric efficiency, and a sky-high rev line...