Triumph 2010 Rocket III Handbook page 53

Accessories, Loading and Passengers
Warning
Do not carry a passenger unless he or she
is tall enough to reach the footrests
provided.
A passenger who is not tall enough to
reach the footrests will be unable to sit
securely on the motorcycle and may cause
instability leading to loss of control and an
accident.
Warning
If the passenger seat is used to carry small
objects, they must not exceed 5 kg in
weight, must not impair control of the
motorcycle, must be securely attached and
must not extend beyond the rear or sides
of the motorcycle.
Carriage of objects in excess of 5 kg in
weight, that are insecure, impair control or
extend beyond the rear or sides of the
motorcycle may lead to loss of motorcycle
control and an accident.
Even if small objects are correctly loaded,
the maximum speed of the motorcycle
must be reduced to 80 mph (130 km/h).
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