Yamaha 2007 R6 Service

							FEATURES
1-2
EAS20170
FEATURES
ET2C01025
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum 
air-fuel ratio in accordance with the engine operating conditions and the atmospheric temperature. In 
the conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the combustion 
chamber is created by the volume of the intake air and the fuel that is metered by the jet used in the 
respective carburetor.
Despite the same volume of intake air, the fuel volume requirement varies by the engine operating con-
ditions, such as acceleration, deceleration, or operating under a heavy load. Carburetors that meter the 
fuel through the use of jets have been provided with various auxiliary devices, so that an optimum air-
fuel ratio can be achieved to accommodate the constant changes in the operating conditions of the en-
gine.
As the requirements for the engine to deliver more performance and cleaner exhaust gases increase, 
it becomes necessary to control the air-fuel ratio in a more precise and finely tuned manner. To accom-
modate this need, this model has adopted an electronically controlled fuel injection (FI) system, in place 
of the conventional carburetor system. This system can achieve an optimum air-fuel ratio required by 
the engine at all times by using a microprocessor that regulates the fuel injection volume according to 
the engine operating conditions detected by various sensors.
The adoption of the FI system has resulted in a highly precise fuel supply, improved engine response, 
better fuel economy, and reduced exhaust emissions.
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1. Air temperature sensor
2. Engine trouble warning light
3. Air induction system solenoid
4. Throttle servo motor
5. Atmospheric pressure sensor
6. Secondary injectors
7. Primary injectors
8. Intake air pressure sensor
9. Fuel pump
10. Relay unit (fuel pump relay)
11. Lean angle sensor
12. ECU (engine control unit)
13. EXUP servo motor
14. O
2 sensor15. Speed sensor
16. Coolant temperature sensor
17. Crankshaft position sensor
18. Throttle position sensor (for throttle cable 
pulley)
19. Throttle position sensor (for throttle valves)
20. Spark plug
21. Ignition coil
22. Cylinder identification sensor 
						

							FEATURES
1-3
ET2C01019
FI SYSTEM
The fuel pump delivers fuel to the fuel injector via the fuel filter. The pressure regulator maintains the 
fuel pressure that is applied to the fuel injector at only 324 kPa (3.24 kg/cm², 46.1 psi). Accordingly, 
when the energizing signal from the ECU energizes the fuel injector, the fuel passage opens, causing 
the fuel to be injected into the intake manifold only during the time the passage remains open. There-
fore, the longer the length of time the fuel injector is energized (injection duration), the greater the vol-
ume of fuel that is supplied. Conversely, the shorter the length of time the fuel injector is energized 
(injection duration), the lesser the volume of fuel that is supplied.
The injection duration and the injection timing are controlled by the ECU. Signals that are input from the 
throttle position sensor (for throttle cable pulley), throttle position sensor (for throttle valves), coolant 
temperature sensor, atmospheric pressure sensor, cylinder identification sensor, lean angle sensor, 
crankshaft position sensor, intake air pressure sensor, air temperature sensor, speed sensor and O
2 
sensor enable the ECU to determine the injection duration. The injection timing is determined through 
the signals from the crankshaft position sensor. As a result, the volume of fuel that is required by the 
engine can be supplied at all times in accordance with the driving conditions.
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1. Secondary injector
2. Fuel pump
3. Primary injector
4. Cylinder identification sensor
5. ECU (engine control unit)
6. Throttle position sensor (for throttle cable 
pulley)
7. Throttle position sensor (for throttle valves)
8. Speed sensor
9. Air temperature sensor
10. Lean angle sensor
11. O
2 sensor12. Catalytic converter
13. Coolant temperature sensor
14. Crankshaft position sensor
15. Intake air pressure sensor
16. Throttle servo motor
17. Throttle body
18. Atmospheric pressure sensor
19. Air filter case
A. Fuel system
B. Air system
C. Control system 
						

							FEATURES
1-4
ET2C01026
YCC-T (Yamaha Chip Controlled Throttle)
Mechanism characteristics
Yamaha developed the YCC-T system employing the most advanced electronic control technologies. 
Electronic control throttle systems have been used on automobiles, but Yamaha has developed a fast-
er, more compact system specifically for the needs of a sports motorcycle. The Yamaha-developed 
system has a high-speed calculating capacity that produces computations of running conditions every 
1/1000th of a second.
The YCC-T system is designed to respond to the throttle action of the rider by having the ECU instan-
taneously calculate the ideal throttle valve opening and generate signals to operate the motor-driven 
throttle valves and thus actively control the intake air volume.
The ECU contains three CPUs with a capacity about five times that of conventional units, making it pos-
sible for the system to respond extremely quickly to the slightest adjustments made by the rider. In par-
ticular, optimized control of the throttle valve opening provides the optimum volume of intake air for 
easy-to-use torque, even in a high-revving engine.
Aims and advantages of using YCC-T
Increased engine power
By shortening the air intake path, higher engine speed is possible → Increased engine power.
Improved driveability
Air intake volume is controlled according to the operating conditions → Improved throttle response to 
meet engine requirement.
Driving force is controlled at the optimal level according to the transmission gear position and engine 
speed → Improved throttle control.
Engine braking control
Due to the throttle control, optimal engine braking is made possible.
Simplified idle speed control (ISC) mechanism
The bypass mechanism and ISC actuator are eliminated → A simple mechanism is used to maintain 
a steady idle speed.
Reduced weight
Compared to using a sub-throttle mechanism, weight is reduced.
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1. Throttle position sensor (for throttle cable 
pulley)
2. Throttle servo motor
3. Throttle position sensor (for throttle valves)
4. Throttle valves
5. Throttle cable pulley with linkage guard
A. To throttle grip 
						

							FEATURES
1-5
YCC-T system outline
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1. Throttle position sensor (for throttle cable 
pulley)
2. Throttle servo motor
3. Throttle position sensor (for throttle valves)
4. ECU (engine control unit)
5. ETV main CPU (32 bit)
6. ETV sub CPU (16 bit)
7. FI CPU (32 bit)
8. Throttle servo motor driver
9. Throttle servo motor driver operation 
sensing/shut off circuit
10. Throttle servo motor driver operation sensing 
feedback/emergency stop
11. Emergency stop
12. Engine revolution (pulse signal)
13. Sensor input
14. Neutral switch
15. Crankshaft position sensor
16. Speed sensor
17. Coolant temperature sensor18. Atmospheric pressure sensor 
						

							FEATURES
1-6
YCC-T control outline
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1. Throttle position sensor (for throttle cable 
pulley)
2. Throttle position sensor (for throttle valves)
3. Crankshaft position sensor
4. Speed sensor
5. Coolant temperature sensor
6. Neutral switch
7. Atmospheric pressure sensor
8. Throttle position (for throttle cable pulley) (two 
signals)
9. Throttle position (for throttle valves) (two 
signals)
10. Engine revolution
11. Vehicle speed
12. Coolant temperature
13. Neutral/In gear
14. Atmospheric pressure
15. Throttle servo motor
16. ECU (engine control unit)
17. Base map18. Idle speed control
19. Calculated throttle valve opening angle 
						

							FEATURES
1-7
ET2C01020
INSTRUMENT FUNCTIONS
Multi-function meter unit
WARNING
EW2C01003
Be sure to stop the vehicle before making 
any setting changes to the multi-function 
meter unit.
The multi-function meter unit is equipped with 
the following:
a speedometer (which shows the riding speed)
a tachometer (which shows engine speed)
an odometer (which shows the total distance 
traveled)
two tripmeters (which show the distance trav-
eled since they were last set to zero)
a fuel reserve tripmeter (which shows the dis-
tance traveled since the fuel level warning light 
came on)
a stopwatch
a clock
a coolant temperature display
an air intake temperature display
a self-diagnosis device
a display brightness and shift timing indicator 
light control mode
NOTE:
Be sure to turn the key to “ON” before using the 
“SELECT” and “RESET” buttons.To switch the speedometer and odometer/trip-
meter displays between kilometers and miles, 
press the “SELECT” button for at least one 
second.
Tachometer
The electric tachometer allows the rider to mon-
itor the engine speed and keep it within the ideal 
power range.
When the key is turned to “ON”, the tachometer 
needle will sweep once across the r/min range 
and then return to zero r/min in order to test the 
electrical circuit.
CAUTION:
EC2C01020
Do not operate the engine in the tachometer 
red zone. 
Red zone: 17500 r/min and above
Clock mode
Turn the key to “ON”.
1. Clock
2. Speedometer
3.“SELECT” button
4.“RESET” button
5. Tachometer
6. Coolant temperature display/air intake 
temperature display
7. Odometer/tripmeters/fuel reserve 
tripmeter/stopwatch
8. Shift timing indicator light
1. Tachometer
2. Tachometer red zone
1. Clock 
						

							FEATURES
1-8
To set the clock:
1. Push the “SELECT” button and “RESET” but-
ton together for at least two seconds.
2. When the hour digits start flashing, push the 
“RESET” button to set the hours.
3. Push the “SELECT” button, and the minute 
digits will start flashing.
4. Push the “RESET” button to set the minutes.
5. Push the “SELECT” button and then release 
it to start the clock.
Odometer, tripmeter, and stopwatch modes
Push the “SELECT” button to switch the display 
between the odometer mode “ODO”, the tripme-
ter modes “TRIP A” and “TRIP B” and the stop-
watch mode in the following order:
TRIP A → TRIP B → ODO → Stopwatch → 
TRIP A
If the fuel level warning light comes on, the 
odometer display will automatically change to 
the fuel reserve tripmeter mode “F-TRIP” and 
start counting the distance traveled from that 
point. In that case, push the “SELECT” button to 
switch the display between the various tripme-
ter, odometer, and stopwatch modes in the fol-
lowing order:
F-TRIP → Stopwatch → TRIP A → TRIP B → 
ODO → F-TRIP
To reset a tripmeter, select it by pushing the “SE-
LECT” button, and then push the “RESET” but-
ton for at least one second. If you do not reset 
the fuel reserve tripmeter manually, it will reset 
itself automatically and the display will return to 
the prior mode after refueling and traveling 5 km 
(3 mi).
Stopwatch mode
To change the display to the stopwatch mode, 
select it by pushing the “SELECT” button. (The 
stopwatch digits will start flashing.) Release the “SELECT” button, and then push it again for a 
few seconds until the stopwatch digits stop 
flashing.
Standard measurement:
1. Push the “RESET” button to start the stop-
watch.
2. Push the “SELECT” button to stop the stop-
watch.
3. Push the “SELECT” button again to reset the 
stopwatch.
Split-time measurement:
1. Push the “RESET” button to start the stop-
watch.
2. Push the “RESET” button or start switch “” 
to measure split-times. (The colon “:” will start 
flashing.)
3. Push the “RESET” button or start switch “” 
to display the final split-time or push the “SE-
LECT” button to stop the stopwatch and dis-
play total elapsed time.
4. Push the “SELECT” button to reset the stop-
watch.
NOTE:
To change the display back to the prior mode, 
push the “SELECT” button for a few seconds.
Coolant temperature display
The coolant temperature display indicates the 
temperature of the coolant. Push the “RESET” 
button to switch the coolant temperature display 
to the air intake temperature display.
NOTE:
When the coolant temperature display is select-
ed, “C” is displayed for one second, and then the 
coolant temperature is displayed.
1. Odometer/tripmeters/fuel reserve 
tripmeter/stopwatch
1. Coolant temperature display 
						

							FEATURES
1-9
CAUTION:
EC2C01021
Do not operate the engine if it is overheated.
Air intake temperature display
The air intake temperature display indicates the 
temperature of the air drawn into the air filter 
case. Push the “RESET” button to switch the 
coolant temperature display to the air intake 
temperature display.
NOTE:
Even if the air intake temperature is set to be 
displayed, the coolant temperature warning 
light comes on when the engine overheats.
When the key is turned to “ON”, the coolant 
temperature is automatically displayed, even if 
the air intake temperature was displayed prior 
to turning the key to “OFF”.
When the air intake temperature display is se-
lected, “A” is displayed before the temperature.
Self-diagnosis device
This model is equipped with a self-diagnosis de-
vice for various electrical circuits.
If any of those circuits are defective, the engine 
trouble warning light will come on, and then the 
odometer/trip meter/fuel reserve trip meter/stop-
watch display will indicate a two-digit error code 
(e.g., 11, 12, 13).
If the display indicates an error code, note the 
code number, and then check the vehicle. Refer 
to “FUEL INJECTION SYSTEM” on page 8-33.
CAUTION:
EC2C01022
If the display indicates an error code, the ve-
hicle should be checked as soon as possible 
in order to avoid engine damage.Display brightness and shift timing indicator
light control mode
This mode cycles through five control functions, 
allowing you to make the following settings in the 
order listed below.
Display brightness:
This function allows you to adjust the bright-
ness of the displays and tachometer to suit the 
outside lighting conditions.
Shift timing indicator light activity:
This function allows you to choose whether or 
not the indicator light should be activated and 
whether it should flash or stay on when activat-
ed.
Shift timing indicator light activation:
This function allows you to select the engine 
speed at which the indicator light will be acti-
vated.
Shift timing indicator light deactivation:
This function allows you to select the engine 
speed at which the indicator light will be deac-
tivated.
Shift timing indicator light brightness:
This function allows you to adjust the bright-
ness of the indicator light to suit your prefer-
ence.
NOTE:
In this mode, the odometer/trip meter/fuel re-
serve trip meter/stopwatch display shows the 
current setting for each function (except the shift 
timing indicator light activity function).
1. Air intake temperature display
1. Display brightness
2. Shift timing indicator light 
activation/deactivation
3. Shift timing indicator light 
						

							FEATURES
1-10
To adjust the brightness of the multi-function 
meter displays and tachometer:
1. Turn the key to “OFF”.
2. Push and hold the “SELECT” button.
3. Turn the key to “ON”, and then release the 
“SELECT” button after five seconds.
4. Push the “RESET” button to select the de-
sired brightness level.
5. Push the “SELECT” button to confirm the se-
lected brightness level. The control mode 
changes to the shift timing indicator light ac-
tivity function.
To set the shift timing indicator light activity func-
tion:
1. Push the “RESET” button to select one of the 
following indicator light activity settings:
The indicator light will stay on when activated. 
(This setting is selected when the indicator 
light stays on.)
The indicator light will flash when activated. 
(This setting is selected when the indicator 
light flashes four times per second.)
The indicator light is deactivated; in other 
words, it will not come on or flash. (This set-
ting is selected when the indicator light flash-
es once every two seconds.)
2. Push the “SELECT” button to confirm the se-
lected indicator light activity. The control 
mode changes to the shift timing indicator 
light activation function.
To set the shift timing indicator light activation 
function:
NOTE:
The shift timing indicator light activation function 
can be set between 10000 r/min and 18000 
r/min. From 10000 r/min to 13000 r/min, the indi-
cator light can be set in increments of 500 r/min. 
From 13000 r/min to 18000 r/min, the indicator 
light can be set in increments of 200 r/min.
1. Push the “RESET” button to select the de-
sired engine speed for activating the indicator 
light.
2. Push the “SELECT” button to confirm the se-
lected engine speed. The control mode 
changes to the shift timing indicator light de-
activation function.To set the shift timing indicator light deactivation 
function:
NOTE:
The shift timing indicator light deactivation 
function can be set between 10000 r/min and 
18000 r/min. From 10000 r/min to 13000 r/min, 
the indicator light can be set in increments of 
500 r/min. From 13000 r/min to 18000 r/min, 
the indicator light can be set in increments of 
200 r/min.
Be sure to set the deactivation function to a 
higher engine speed than for the activation 
function, otherwise the shift timing indicator 
light will remain deactivated.
1. Push the “RESET” button to select the de-
sired engine speed for deactivating the indi-
cator light.
2. Push the “SELECT” button to confirm the se-
lected engine speed. The control mode 
changes to the shift timing indicator light 
brightness function.
To adjust the shift timing indicator light bright-
ness:
1. Push the “RESET” button to select the de-
sired indicator light brightness level.
2. Push the “SELECT” button to confirm the se-
lected indicator light brightness level. The dis-
play will return to the odometer or tripmeter 
mode. 
						

							IMPORTANT INFORMATION
1-11
EAS20180
IMPORTANT INFORMATION
EAS20190
PREPARATION FOR REMOVAL AND 
DISASSEMBLY
1. Before removal and disassembly, remove all 
dirt, mud, dust and foreign material.
2. Use only the proper tools and cleaning equip-
ment.
Refer to “SPECIAL TOOLS” on page 1-14.
3. When disassembling, always keep mated 
parts together. This includes gears, cylinders, 
pistons and other parts that have been “mat-
ed” through normal wear. Mated parts must 
always be reused or replaced as an assem-
bly.
4. During disassembly, clean all of the parts and 
place them in trays in the order of disassem-
bly. This will speed up assembly and allow for 
the correct installation of all parts.
5. Keep all parts away from any source of fire.
EAS20200
REPLACEMENT PARTS
Use only genuine Yamaha parts for all replace-
ments. Use oil and grease recommended by 
Yamaha for all lubrication jobs. Other brands 
may be similar in function and appearance, but 
inferior in quality.
EAS20210
GASKETS, OIL SEALS AND O-RINGS
1. When overhauling the engine, replace all 
gaskets, seals and O-rings. All gasket surfac-
es, oil seal lips and O-rings must be cleaned.
2. During reassembly, properly oil all mating 
parts and bearings and lubricate the oil seal 
lips with grease.
EAS20220
LOCK WASHERS/PLATES AND COTTER 
PINS
After removal, replace all lock washers/plates 
“1” and cotter pins. After the bolt or nut has been 
tightened to specification, bend the lock tabs 
along a flat of the bolt or nut.
1. Oil
2. Lip
3. Spring
4. Grease