Honda TRX500FM Owner's Manual page 165

Tires
A manually operated tire pump should be used rather than the high
pressure system found in service stations. This will minimize the
possibility of tire damage from overinflation. If you use a high pressure
system at a service station, add air in small amounts and check the
pressure increase frequently to prevent possible tire damage from
overinflation.
Operating this ATV with improper tires, or with
uneven tire pressure may cause loss of control,
and you could be seriously injured or killed.
Always use the size and type tires specified in
this owner's manual for this vehicle.
Always maintain proper tire pressure as
described in this owner's manual.
Inspection
Refer to Saf ety Precautions
Whenever you check the tire pressures, you should also look for:
Bumps or bulges in the side of the tire or the tread. Replace any tire
that has a bump or bulge.
Cuts, slits, or cracks in the tires. Replace the tire if you can see fabric
or cord.
Nails or other foreign objects embedded in the side of the tire or tread.
Excessive tread wear.
156 Servicing Your Honda
on page 95 .