Why am I not getting the published range and top speed?

Many factors affect the range and top speed you will see beyond your body weight. Bulky clothing, riding stance. bags, back packs and accessories attached to your scooter add weight and drag affecting range.

At speeds over 10 mph (16 kph), aerodynamic (aero) drag becomes the dominant force of resistance, with no wind on flat terrain: At 18 mph (29 kph) it becomes 80% of the resistance 25 mph (40 kph) it becomes 90% of the dominant force.

Other factors include but are not limited to speedometer accuracy, temperature, surface, tire pressure, tire tread, tire wear and brake drag and how you charge and manage your battery. Most vehicles may not achieve top speed if battery level is under 50%.

Currently the scooter industry has no standard range test and all manufacturers use their own processes that may vary significantly. Examples could be range testing on a Dyno meter where there is no aero drag or inside a warehouse in controlled conditions on a very smooth concrete floor. The rider weight assumed is about 70 kg or 155 lbs. but this is not standard for the industry either. 

See how cold weather affects your range.