Honda NSS250S Manual page 76

TECHNICAL FEATURES
A mode [Automatic shifting]
A mode is the system that controls the shifting 7-speed automatically by the PCM.
The PCM receives the signal from the TP, CKP, VS sensors, and shift the 7-speed automatically according to the situation.
Therefore, this A mode realizes running like the manual transmission by only operating the throttle.
D mode (Example) :
Engine revolution
High-angle
Throttle opening angle
low-angle
A mode (Example) :
Engine revolution
High-angle
Throttle opening angle
Low-angle
2-8
maxiscooter-club.ru
High
Low
High
Automatic down
Low
5 gear
3 gear
Automatic up
Braking!
Acceleration
Braking!
4 gear
Automatic down Automatic up
2 gear
Accleration
Quickly down
Time
Constant
rate
Automatic up
Quickly down
Time
3 gear
Constant
rate