5-4 COOLING AND LUBRICATION SYSTEM
RADIATOR AND WATER HOSES
RADIATOR REMOVAL
• Remove the under cowling. (6-5)
• Drain engine coolant. (2-18)
• Remove the radiator. (3-4 and -5)
RADIATOR CAP INSPECTION
• Fit the cap 1 to the radiator cap tester 2.
• Build up pressure slowly by operating the tester. Make sure
that the pressure build-up stops at 95–125 kPa (0.95–12.5 kgf/
cm
2
, 13.5–17.8 psi) and that, with the tester held standstill, the
cap is capable of holding that pressure for at least 10 seconds.
• Replace the cap if it is found not to satisfy either of these two
requirements.
 Radiator cap valve opening pressure
Standard: 95 – 125 kPa
(0.95 – 1.25 kgf/cm
2
, 13.5 – 17.8 psi)
RADIATOR INSPECTION AND CLEANING
• Road dirt or trash stuck to the fins must be removed.
• Use of compressed air is recommended for this cleaning.
• Fins bent down or dented can be repaired by straightening them
with the blade of a small screwdriver.
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