2008-2010 Kawasaki KFX450R Factory Service Manual, Page 39Get this manual
2-20 PERIODIC MAINTENANCE Periodic Maintenance Procedures
CAUTION
Soft or distilled water must be used with the antifreeze in the cooling systemIf hard water is used in the system, it causes scale accumulation in the water passages, considerably reducing the efficiency of the cooling systemWater and Coolant Mixture Ratio (when shipping) Soft Water: Coolant: Freezing Point: Total Amount: 50 50 35C31F) 1.4 (1.5 US qt)
Choose suitable mixture ratio by referring to the coolant manufacturer's directionsthe air from the cooling system as follows Bleedthe engine with the radiator cap removed and run it Start until no more air bubbles [A] can be seen in the coolantTap the radiator hoses to force any air bubbles caught insideStop the engine and add coolant up to the radiator filler neckInstall the radiator cap