How fast is a 90cc?

There are two different types of 90cc units. Here are the best answers I have considering I have been selling these for years:

A 90cc Fully Automatic will go about 25MPH. This is because the engine has one gear and to avoid losing power off the start it is geared to perform in both top and low end the best for kids.

A 90cc semi automatic will go much faster considering you can shift gears and adjust the rpm's based on the terrain. I would say a 90cc semi automatic will go about 40 mph+ also depending on the riders weight.