The assist range of the kit is test under the following conditions:
The weight of the rider is 60kg, the bike weight is 20kg, on flat level road, no wind, 25℃ temperature, under manual mode 50% assist grade, constant speed 25km/h without stop.

The actual range depends on many factors. If you use the throttle all the time the range will be about one third of the assist range. 

If the Gyroscope angle is not calibrated correctly, the range will be abnormal too.