I had 3 motorcycles once at the same in x years,

50 cc Yamaha (1 cylinder, 2 strokes, 90 mpg; with 55 mph, the engine runs at 8-9000 rpm; Brand New; that was the one in my article),

360 cc Honda (2 cylinders, 4 strokes),

750 cc Yamaha (3 cylinders, 4 strokes).