Honda NSS300A Owner's Manual page 62

Starting the Engine
If you cannot start the engine:
Place the scooter on its centre stand and
a
squeeze the rear brake lever.
With the throttle slightly open (about 3 mm,
b
without freeplay), press the start button.
About 3 mm, without freeplay
58
(Continued)
If the engine does not start:
a
b
c
d
#
Open the throttle fully and press the start
button for 5 seconds.
Repeat the normal starting procedure.
If the engine starts, open the throttle slightly
if idling is unstable.
If the engine does not start, wait 10 seconds
before trying steps a & b again.
If Engine Will Not Start
(P.108)