Yamaha MT-09 2021 Service Manual

8-63
ELECTRICAL COMPONENTS
EAS30577
CHECKING THE RADIATOR FAN MOTOR
1. Check:
• Radiator fan motor
Faulty/rough movement → Replace.
a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
c. Measure the radiator fan motor movement.
EAS30578
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
Refer to “CYLINDER HEAD” on page 5-26.
WARNING
EWA14130
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature sen-
sor to strong shocks. If the coolant tem-
perature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification → Replace.
a. Connect the digital circuit tester (Ω) to the
coolant temperature sensor as shown.
b. Immerse the coolant temperature sensor
“1” in a container filled with coolant “2”.
TIP
Make sure the coolant temperature sensor ter-
minals do not get wet.
c. Place a thermometer “3” in the coolant.
d. Heat the coolant or let it cool down to the
specified temperatures.
e. Measure the coolant temperature sensor
resistance.
3. Install:
• Coolant temperature sensor
EAS30592
CHECKING THE THROTTLE SERVO MOTOR
1. Remove:
• Air filter case
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Positive tester probe
blue “1”
• Negative tester probe
black “2”
ABS
1
Coolant temperature sensor re-
sistance
2513–2777 Ω at 20 °C (2513–
2777 Ω at 68 °F)
Coolant temperature sensor re-
sistance
210–221 Ω at 100 °C (210–221 Ω
at 212 °F)
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
Coolant temperature sensor
15 N·m (1.5 kgf·m, 11 lb·ft)
3
1
2
G089056
T
R
.
.

Yamaha MT-09 2021 Specifications

General

Displacement	889cc
Bore x Stroke	78.0 mm x 62.1 mm
Compression Ratio	11.5:1
Fuel System	Fuel Injection
Transmission	6-speed
Frame Type	Diamond
Front Brake	Hydraulic dual disc, Ø298 mm
Rear Brake	Hydraulic single disc, Ø245 mm
Front Tire	120/70ZR17M/C (58W)
Rear Tire	180/55ZR17M/C (73W)
Overall Length	2, 090 mm
Overall Height	1, 190 mm
Seat Height	825 mm
Wheelbase	1, 430 mm
Wet Weight	189 kg
Fuel Tank Capacity	14 L
Lubrication System	Wet sump
Clutch Type	Wet, Multiple Disc
Ignition System	TCI
Starter System	Electric
Final Transmission	Chain
Fuel Consumption	5.0 L/100 km
Front Travel	130 mm
Rear Travel	122 mm
Minimum Ground Clearance	140 mm
Oil Tank Capacity	3.5 L
Engine Type	Liquid-cooled, 4-stroke, DOHC, 3-cylinder
Maximum Power	87.5 kW (119.0 PS) @ 10, 000 rpm
Maximum Torque	93 Nm (9.5 kg-m) @ 7, 000 rpm
Front Suspension	Telescopic fork
Rear Suspension	Swingarm