Honda TRX450ER Owner's Manual page 68

Braking
Your ability to brake in a turn and to brake hard in an emergency
situation are important riding skills.
When descending a long, steep grade, use engine compression braking
by downshifting, with intermittent use of both brakes. Continuous brake
application can overheat the brakes and reduce their effectiveness.
To prevent stalling the engine, pull the clutch lever/parking brake lever
in before coming to a complete stop.
Riding with your foot resting on the brake pedal or your hand on the
brake lever may overheat the brakes, reducing effectiveness.
For information on how to apply the brakes in various riding situations,
see the following section, Riding Your ATV .
Basic Operation & Riding 59