Honda CRF230F 2006 Owner's Manual page 45

Braking
When descending a long, steep grade, use
engine compression braking by downshifting,
with intermittent use of both brakes.
When you brake to a stop, pull the clutch lever
in before stopping completely to prevent
stalling the engine. For support, put your left
foot on the ground first, then your right foot
when you're through braking.
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Basic Operation & Riding