Yamaha 2007 R6 Service

							THROTTLE BODIES
7-10
12 Heat protector 1
13 Throttle body joint 4
For installation, reverse the removal proce-
dure.
Removing the throttle body assembly
Order Job/Parts to remove Q’ty Remarks
T R..10 Nm (1.0 m • 
kg, 7.2 ft • Ib)
7
10
3
21
5
8 (8)11
4
12
6
9
13 
						

							THROTTLE BODIES
7-11
Removing the primary injectors
Order Job/Parts to remove Q’ty Remarks
1 Intake air pressure sensor coupler 1 Disconnect.
2 Cylinder-#1 primary injector coupler 1 Disconnect.
3 Cylinder-#2 primary injector coupler 1 Disconnect.
4 Cylinder-#3 primary injector coupler 1 Disconnect.
5 Cylinder-#4 primary injector coupler 1 Disconnect.
6 Sub-wire harness 2 1
7 Intake air pressure sensor hose 7
8 Intake air pressure sensor 1
9 Primary injector fuel rail 1
10 Primary injector 4
11 Throttle position sensor (for throttle valves) 1
12 Throttle position sensor (for throttle cable pulley) 1
13 Throttle bodies 1
CAUTION:
ECA14600
The throttle bodies should not be disas-sembled.
For installation, reverse the removal proce-
dure.
New
New
New
5
108
7 7
76
12 119 7 7
7 7
10
10
10
134
3
1
2
T R..5 Nm (0.5 m • 
kg, 3.6 ft • Ib)
T R..3.5 Nm (0.35 m • 
kg, 2.53 ft • lb)
T R..3.5 Nm (0.35 m • 
kg, 2.53 ft • lb)
T R..3.5 Nm (0.35 m • 
kg, 2.53 ft • lb) 
						

							THROTTLE BODIES
7-12
EAS26980
CHECKING THE PRIMARY INJECTORS
1. Check:
•Injectors
Damage → Replace.
EAS26990
CHECKING THE THROTTLE BODIES
1. Check:
•Throttle bodies
Cracks/damage → Replace the throttle bod-
ies as a set.
2. Check:
•Fuel passages
Obstructions → Clean.



 
 
 








 
 



 
 



 
 







a. Wash the throttle bodies in a petroleum- 
based solvent.
Do not use any caustic carburetor cleaning 
solution.
b. Blow out all of the passages with compressed 
air.
         
ET2C05001
CHECKING THE ROLLOVER VALVE (for 
California only)
1. Check:
•Rollover valve “1”
Damage/faulty → Replace.
NOTE:
•Check that air flows smoothly only in the direc-
tion of the arrow shown in the illustration.
•The rollover valve must be in an upright posi-
tion when checking the airflow.
EAS27010
CHECKING THE FUEL PRESSURE
1. Check:
•Fuel pressure



 
 
 








 
 



 
 



 
 







a. Remove the rider seat.
Refer to “GENERAL CHASSIS” on page 4-1.b. Disconnect the fuel hose (fuel tank to primary 
injector fuel rail) “1” from the primary injector 
fuel rail.
WARNING
EW2C01008
Cover fuel hose connections with a cloth 
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to 
spurt out when removing the hoses.
c. Connect the pressure gauge “2” and adapter 
“3” to the fuel hose (fuel tank to primary injec-
tor fuel rail).
d. Start the engine.
e. Measure the fuel pressure.
Faulty → Replace the fuel pump.
          
1
 
Pressure gauge
90890-03153
Pressure gauge
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
 
Fuel pressure
324 kPa (46.1 psi) (3.24 kg/cm²)
1
2
3
1 
						

							THROTTLE BODIES
7-13
ET2C01007
ADJUSTING THE THROTTLE POSITION 
SENSOR (FOR THROTTLE VALVES)
1. Check:
• Throttle position sensor (for throttle valves)
Refer to “CHECKING THE THROTTLE PO-
SITION SENSOR (FOR THROTTLE 
VALVES)” on page 8-97.
2. Adjust:
 Throttle position sensor angle



 
 
 








 
 



 
 



 
 







a. Connect the two C size batteries to the throt-
tle servo motor terminal as shown.
CAUTION:
EC2C01027
Do not use a 12 V battery to operate the throt-
tle valves.
b. Check that the throttle valves are fully closed.
c. Connect the throttle position sensor coupler 
to the throttle position sensor.
d. Connect the digital circuit tester to the throttle 
position sensor.
e. Measure the throttle position sensor voltage.
f. Adjust the throttle position sensor angle so 
that the voltage is within the specified range.g. After adjusting the throttle position sensor an-
gle, tighten the throttle position sensor 
screws “4”.
          
ET2C01008
ADJUSTING THE THROTTLE POSITION 
SENSOR (FOR THROTTLE CABLE PULLEY)
1. Check:
 Throttle position sensor (for throttle cable pul-
ley)
Refer to “CHECKING THE THROTTLE PO-
SITION SENSOR (FOR THROTTLE CABLE 
PULLEY)” on page 8-98.
2. Adjust:
 Throttle position sensor angle



 
 
 








 
 



 
 



 
 



 



a. Connect the throttle position sensor coupler 
to the throttle position sensor.
b. Connect the digital circuit tester to the throttle 
position sensor.
c. Measure the throttle position sensor voltage.
d. Adjust the throttle position sensor angle so 
that the voltage is within the specified range.
e. After adjusting the throttle position sensor an-
gle, tighten the throttle position sensor 
screws “4”.  Positive battery lead
light green/red terminal “1”
 Negative battery lead
yellow/red terminal “2”
 Positive tester probe
blue terminal “1” or green terminal “2”
 Negative tester probe
black/blue terminal “3”
 
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
 
Output voltage
0.590–0.690 V
Lg/RY/B
1
2
Positive tester probe
white terminal “1” or white/red terminal “2”
Negative tester probe
black/blue terminal “3”
 
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
 
Output voltage
0.630–0.730 V
4
4
21
3 
						

							THROTTLE BODIES
7-14
         
ET2C01009
INSTALLING THE THROTTLE BODY JOINTS
1. Install:
Throttle body joints “1”
NOTE:
Be sure to install the throttle body joints with the 
“L” mark onto the throttle body openings for cyl-
inders #1 and #2 and the joints with the “R” mark 
onto the openings for cylinders #3 and #4.
T R.. 
Throttle body joint bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
4
41
3
2
L
R
1 
						

							AIR INDUCTION SYSTEM
7-15
EAS27040
AIR INDUCTION SYSTEM
2
1
2
4
3
4
3
6
4
5
A
A 
						

							AIR INDUCTION SYSTEM
7-16
1. Lower air filter case
2. Air induction system hose (air filter case to air 
cut-off valve)
3. Air cut-off valve
4. Air induction system hose (air cut-off valve to 
cylinder head cover)
5. Reed valve assembly
6. Exhaust port 
						

							AIR INDUCTION SYSTEM
7-17
Removing the air cut-off valve
Order Job/Parts to remove Q’ty Remarks
Fuel tank Refer to “FUEL TANK” on page 7-1.
Air filter case Refer to “AIR FILTER CASE” on page 7-5.
Canister (for California only) Refer to “THROTTLE BODIES” on page 7-8.
1 Air induction system cover 1
2 Air induction system solenoid coupler 1 Disconnect.
3Air induction system hose (air filter case to air 
cut-off valve)1
4Air induction system hose (air cut-off valve to 
cylinder head cover)2
5 Air cut-off valve 1
For installation, reverse the removal proce-
dure.
1
4
45
3
2 
						

							AIR INDUCTION SYSTEM
7-18
Removing the reed valves
Order Job/Parts to remove Q’ty Remarks
1 Reed valve cover 2
2 Reed valve assembly 2
3 Reed valve plate 4
For installation, reverse the removal proce-
dure.
1
3
LTLT
LTLT
1
22
3
LTLT
T R..10 Nm (1.0 m • 
kg, 7.2 ft • Ib)
T R..10 Nm (1.0 m • 
kg, 7.2 ft • Ib) 
						

							AIR INDUCTION SYSTEM
7-19
EAS27060
CHECKING THE AIR INDUCTION SYSTEM
Air injection
The air induction system burns unburned ex-
haust gases by injecting fresh air (secondary air) 
into the exhaust port, reducing the emission of 
hydrocarbons. When there is negative pressure 
at the exhaust port, the reed valve opens, allow-
ing secondary air to flow into the exhaust port. 
The required temperature for burning the un-
burned exhaust gases is approximately 600 to 
700 °C (1112 to 1292 °F).
Air cut-off valve
The air cut-off valve is controlled by the signals 
from the ECU in accordance with the combus-
tion conditions. Ordinarily, the air cut-off valve 
opens to allow the air to flow during idle and 
closes to cut-off the flow when the vehicle is be-
ing driven. However, if the coolant temperature 
is below the specified value, the air cut-off valve 
remains open and allows the air to flow into the 
exhaust pipe assembly until the temperature be-
comes higher than the specified value.
1. Check:
•Hoses
Loose connections → Connect properly.
Cracks/damage → Replace.2. Check:
•Reed valve
•Reed valve stopper
•Reed valve seat
Cracks/damage → Replace the reed valve 
assembly.
3. Measure:
•Reed valve bending limit “a”
Out of specification → Replace the reed 
valve assembly.
4. Check:
•Air cut-off valve
Cracks/damage → Replace.
5. Check:
•Air induction system solenoid
Refer to “CHECKING THE AIR INDUCTION 
SYSTEM SOLENOID” on page 8-99.
A. From the air filter case
B. To the cylinder head
A
BB
A
BB
 
Reed valve bending limit
0.4 mm (0.016 in)