Yamaha 4SH-28199-67 Owner's Manual page 168

Do not exceed the maximum tongue
weight. You can measure tongue weight
with a bathroom scale. Put the tongue of the
loaded trailer on the scale with the tongue
at hitch height. Adjust the load in the trailer,
if necessary, to reduce the weight on hitch.
If you are carrying cargo and towing a trail-
er, include the tongue weight in the maxi-
mum vehicle load limit.
Load cargo on the carrier as close to the
center of the vehicle as possible. Put cargo
at the front of the rear carrier. Center the
load from side to side.
Tie down cargo securely to the carriers.
Make sure cargo in the trailer cannot move
around. A shifting load can cause an acci-
dent.
Make sure the load does not interfere with
controls or your ability to see where you are
going.
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