Yamaha RAPTOR YFM660RR Owner's Manual page 304

CAUTION:
_
Hard water or salt water is harmful to the en-
gine. You may use soft water if you cannot get
distilled water.
_
12. Install the radiator cap and the coolant reser-
voir cap.
13. Start the engine and let it idle for several min-
utes. Stop the engine, and then check the
coolant level in the radiator. If it is low, add
more coolant until it reaches the top of the ra-
diator.
14. Check the coolant level in the reservoir. If it is
low, add coolant to the maximum level mark.
15. Start the engine and then check for coolant
leakage.
NOTE:
_
If any leakage is found, have a Yamaha dealer
check the cooling system.
_
16. Install the panel.
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