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Yamaha MT-09 2021 - Changing the Coolant; Checking the Coolant Level; Checking the Cooling System

Yamaha MT-09 2021
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3-31
PERIODIC MAINTENANCE
EAS30811
CHECKING THE COOLANT LEVEL
1. Stand the vehicle on a level surface.
TIP
Place the vehicle on a maintenance stand.
Make sure the vehicle is upright.
2. Check:
Coolant level
The coolant level should be between the
maximum level mark “a” and minimum level
mark “b”.
Below the minimum level mark Add the
recommended coolant to the proper level.
NOTICE
ECA21281
Adding water instead of coolant dilutes the
antifreeze concentration of the coolant. If
water is used instead of coolant; check,
and if necessary, correct the antifreeze
concentration of the coolant.
Use only distilled water. However, if dis-
tilled water is not available, soft water may
be used.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Check:
Coolant level
TIP
Before checking the coolant level, wait a few
minutes until it settles.
EAS30812
CHECKING THE COOLING SYSTEM
1. Check:
Radiator “1”
Water pump inlet hose “2”
Thermostat housing “3”
Thermostat “4”
Thermostat cover “5”
Radiator outlet hose “6”
Water pump “7”
Radiator inlet hose “8”
Oil cooler outlet hose “9”
Water jacket joint “10”
Oil cooler inlet hose “11”
Oil cooler “12”
Cracks/damage Replace.
Refer to “RADIATOR” on page 6-3, “OIL
COOLER” on page 6-7, “THERMOSTAT” on
page 6-9, and “WATER PUMP” on page 6-
11.
EAS30813
CHANGING THE COOLANT
1. Remove:
Front side panel (right side)
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
Radiator cap “1”
WARNING
EWA13030
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the en-
gine is hot. Scalding hot fluid and steam may
be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap counter-
clockwise toward the detent to allow any re-
sidual pressure to escape. When the hissing
sound has stopped, press down on the radi-
ator cap and turn it counterclockwise to re-
move.
a
b
1
2
3
5
4
6
10
11
12
7
8
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