Yamaha KODIAK ULTRAMATIC YFM400FWAN 2000 Owner's Manual page 103

Test your brakes after leaving the water.
Do not continue to ride your ATV without
verifying that you have regained proper
braking ability.
CAUTION:
After riding your ATV in water, be sure to
drain the trapped water by removing the
check hose at the bottom of the air filter
case and the check hose on the V-belt
cooling duct. Wash the ATV in fresh water
if it has been operated in salt water or
muddy conditions.
1. Air filter case check hose
7-35