Checking The Radiator; Installing The Radiator - Yamaha MT-09 2021 Service Manual

EAS30439

CHECKING THE RADIATOR

1. Check:
• Radiator fin
Obstruction → Clean.
Apply compressed air to the rear of the radia-
tor.
Damage → Repair or replace.
TIP
Straighten any flattened fins with a thin, flat-head
screwdriver.
G089028
2. Check:
• Radiator hose
Cracks/damage → Replace.
3. Measure:
• Radiator cap valve opening pressure
Below the specified pressure → Replace the
radiator cap.
Radiator cap valve opening pres-
sure
107.9–137.3 kPa
(1.08–1.37 kgf/cm², 15.6–19.9
psi)
a. Install the radiator cap tester "1" and radia-
tor cap tester adapter "2" to the radiator cap
"3".
Radiator cap tester
90890-01325
Mityvac cooling system tester kit
YU-24460-A
Radiator cap tester adapter
90890-01352
Pressure tester adapter
YU-33984
G089029
b. Apply specified pressure to the radiator cap
and then, make sure to check the specified
pressure for at least 10 seconds. If it is not
keep the pressure, replace it.
4. Check:
• Radiator fan
Damage → Replace.
Malfunction → Check and repair.
Refer to "COOLING SYSTEM" on page 8-39.
EAS30440

INSTALLING THE RADIATOR

1. Install:
• All removed parts
2. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-31.
3. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
a. Attach the radiator cap tester "1" and radia-
tor cap tester adapter "2" to the radiator.
Radiator cap tester
90890-01325
Mityvac cooling system tester kit
YU-24460-A
Radiator cap tester adapter
90890-01352
Pressure tester adapter
YU-33984
6-5
RADIATOR