Honda BIG RED 2009 Owner's Manual page 144

Tires
Air Pressure
Refer to Safety Precautions on page 69.
Properly inflated tires provide the best combination of handling, tread
life, and driving comfort. Generally, underinflated tires wear unevenly,
adversely affect handling, and are more likely to fail from being
overheated. Overinflated tires make your Honda MUV drive harshly, are
more prone to damage from surface hazards, and wear unevenly.
Make sure the valve stem caps are secure. If necessary, install new caps.
Servicing Your Honda 135