Honda CRF1100A 2021 Owner's Manual page 239

AT MODE: In this mode the gears are shifted
automatically according to your riding
conditions.
And also using the shift up switch (+) or shift
down switch (−), you can temporarily shift up or
down in AT MODE by using the shift switch.
These switches are convenient when you want to
temporarily down-shift in front of a curve, etc.
(P236)
You can choose between two modes within AT
MODE: D mode and S mode.
D mode (AT): This is the standard mode when
AT MODE is selected. Select D mode for regular
operation and efficient fuel economy.
S mode (AT): Select this mode while riding in
AT MODE when you need more power, such as
when overtaking, climbing hills, pulling away.
S mode has three levels of adjustment.
MT MODE: MT MODE (6-speed manual
operation) You can choose between 6 gears in
this mode.
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