Honda WW150HV 2018 Owner's Manual page 60

Starting the Engine
Squeeze the rear brake lever.
c
The starter motor will only work when
u
the rear brake lever is squeezed and the
side stand is up.
Press the start button with the throttle
d
completely closed. Release the start button
as soon as the engine starts.
c
56
(Continued)
If you cannot start the engine:
d
Place the scooter on its centre stand and
a
squeeze the rear brake lever.
With the throttle slightly open (about 3 mm
b
(0.1 in), without freeplay), press the start
button.
About 3 mm (0.1 in), without freeplay