Honda WAVE110 2023 Owner's Manual page 37

Proper shifting can prevent damaging the
engine and transmission.
Upshifting
The upper limit speed of each gear is shown
in gear range.
(P.20)
Upshift to a higher gear before exceeding
the upper limit speed.
Upshifting at speeds higher than the upper
limit speed can cause damage to the engine.
Downshifting
Downshifting at speeds higher than those in
the table below may overrev the engine and
can cause damage to the engine and
transmission.
Follow the table below when downshifting
the gears.
Downshifting Acceptable Speed
From 4th to 3rd 80 km/h (50 mph) or less
From 3rd to 2nd 55 km/h (34 mph) or less
From 2nd to 1st 30 km/h (19 mph) or less
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