Yamaha DT501988 Owner's Manual page 10

LOADING AND ACCESSORIES
Adding accessories or cargo to your motorcycle can adversely affect stability
and handling if the weight distribution of the machine is changed. To avoid the
possibility of an accident, extreme caution should be used if adding cargo or
accessories to your motorcycle. Use extra care if riding a motorcycle which has
added cargo or accessories. Here are some general guidelines to follow if loading
cargo or adding accessories to your motorcycle:
LOADING
The total weight of the operator, accessories and cargo must not exceed
the maximum load limit of 157 lbs. (71 kg).
When loading within these weight limits, keep the following in mind:
1. Cargo and accessory weight should be kept as low and close to the motorcycle
as possible. Be sure to distribute the weight as evenly as possible on both
sides of the machine to minimize imbalance or instability.
2. Shifting weights can create a sudden imbalance. Make sure that accessories
and cargo are securely attached to the motorcycle before riding. Recheck
accessory mounts and cargo restraints frequently.