What kind of gas mileage and preformance do motor scooters from Honda and Yamaha have?

http://www.yamaha-motor.com/sport/produc...

3-5hp , 40mph if you weight 100ibs.

The Honda C100 built in the 1959-1962 got over 150 mpg with a top speed of 40 mph.

The Yamaha Zuma which is hard to find has a 49cc motor, does not require a motorcycle license and get over 50 mpg. The downfall is, top speed is about 35 mph.