[kach22i]

From Viceroy Scooter to small Hovercraft
The Velobanjogent: From Viceroy Scooter to small Hovercraft

The 1964 Viceroy engine with cyl.head fins milled to a "pent-house" shape to reduce resonance.

https://jerryamcm.blogspot.com/2014/03/

The Viceroy engine was very unusual having a 250 cc flat twin two stroke motor. It had reed valve induction because having a common crankcase piston controlled porting would require twin carburettors or an exceptionally long and cumbersome manifold.......................

It was a very powerful motor for the day and would pull the scooter along at speeds in excess of 65mph which was quite quick in its day considering that many 350 cc bikes around at the time did not go any faster.