Make sure all components are tightened. Adjust
the height of the handlebar and the seat post. DO
NOT raise it above the safety line.
Make sure the brakes can cut off the power supply
to the motor, and whether it is sensitive and reliable.
Make sure the front and rear axle nuts are
tightened.
Make sure the display, brakes and lights can work
properly.
Make sure the chain is tight.
Make sure the pedals and all the connection parts
are firm and would not loose, and whether the crank
is flexible without jamming.
Make sure the front and rear tire pressure and tire
wear are suitable for your journey ahead.
Make sure the throttle works well without
jamming, and whether it feels tight or loose when
pressing the throttle.
Make sure the battery has been locked.