Well, if the drive is really 10t, with a 54t rear sprocket , you have a 5.4 to 1 gear ratio
That , will give you, at a governed speed of 3600rpm, high ratio, 66KPH top speed.
Takeoff ratio , with clutch in low range , 13.122:1 . Starting speed of 12kph. Below that the belt has to slip to move...