In 1950's Rumi decided to get involved in the manufacture of lightweight motorcycles. 

It was also decided to base the powerplant on the horizontal twin two stroke unit of 125 cc capacity.

In 1952, with the popularity of scooters, Rumi started manufacturing the Squirrel or Scoiottolo – a cast aluminum monocoque body with tubular swinging arm rear suspension and teleforks with 14 inch wheels and three gears.

Subsequent models had a four speed gearbox and electric starter and were reputed to be the fastest scooters then in production.