Yamaha RAPTOR YFM660R Owner's Manual page 66

Coolant temperature warning light "
When the coolant temperature reaches a spec-
ified level, this light comes on to warn that the
coolant temperature is too hot. If the light
comes on during operation, stop the engine as
soon as it is safe to do so and allow the engine
to cool down for about 10 minutes.
The coolant temperature warning light circuit
can be checked according to the procedure on
page 4-7.
CAUTION:
G
The engine may overheat if the ATV is
overloaded. If this happens, reduce the
load to specification.
G Restart after making sure that the light is
out. Continuous use while the light is on
may cause damage to the engine.
4-5
EBU00713
"