Yamaha 2007 R6 Service

VALVES AND VALVE SPRINGS
5-22
b. Install the valve into the cylinder head.
c. Press the valve through the valve guide and 
onto the valve seat to make a clear impres-
sion.
d. Measure the valve seat width.
NOTE:
Where the valve seat and valve face contacted 
one another, the blueing will have been re-
moved.



 
 
 








 
 



 
 



 
 







4. Lap:
• Valve face
 Valve seat
CAUTION:
EC2C01028
This model uses titanium intake and exhaust 
valves. Titanium valves that have been used 
to lap the...

VALVES AND VALVE SPRINGS
5-23
j. Measure the valve seat width “c” again. If the 
valve seat width is out of specification, reface 
and lap the valve seat.



 
 
 








 
 



 
 



 
 







EAS24310
CHECKING THE VALVE SPRINGS
The following procedure applies to all of the 
valve springs.
1. Measure:
Valve spring free length “a”
Out of specification → Replace the valve 
spring.
2. Measure:
Compressed valve spring force “a”
Out of specification → Replace the valve 
spring.3. Measure:
Valve spring...

VALVES AND VALVE SPRINGS
5-24
EAS24340
INSTALLING THE VALVES
The following procedure applies to all of the 
valves and related components.
1. Deburr:
Valve stem end
(with an oil stone)
2. Lubricate:
Valve stem “1”
Valve stem seal “2”
(with the recommended lubricant)
3. Install:
Lower spring seat “1”
Valve stem seal “2”
Valve “3”
Valve spring “4”
Upper spring seat “5”
(into the cylinder head)
NOTE:
Make sure each valve is installed in its original 
place.
Install the valve springs with the...

VALVES AND VALVE SPRINGS
5-25
5. To secure the valve cotters onto the valve 
stem, lightly tap the valve tip with a soft-face 
hammer.
CAUTION:
ECA13800
Hitting the valve tip with excessive force 
could damage the valve.
6. Lubricate:
Valve lifter
(with the recommended lubricant)
7. Install:
Valve pad
Valve lifter
NOTE:
The valve lifter must move smoothly when ro-
tated with a finger.
Each valve lifter and valve pad must be rein-
stalled in its original position.
 
Recommended lubricant
Engine oil 

GENERATOR AND STARTER CLUTCH
5-26
EAS24480
GENERATOR AND STARTER CLUTCH
Removing the generator and starter clutch
Order Job/Parts to remove Q’ty Remarks
Left bottom cowlingRefer to “GENERAL CHASSIS” on page 
4-1.
Engine oilDrain.
Refer to “CHANGING THE ENGINE OIL” on 
page 3-11.
1 Stator coil assembly coupler 1 Disconnect.
2 Generator cover 1
3 Generator cover gasket 1
4 Dowel pin 2
5 Stator coil assembly lead holder 1
6 Stator coil assembly 1
7 Starter clutch idle gear shaft 1
8 Starter clutch idle gear...

GENERATOR AND STARTER CLUTCH
5-27
11 Starter clutch gear 1
For installation, reverse the removal proce-
dure.
Removing the generator and starter clutch
Order Job/Parts to remove Q’ty Remarks
3
2
6 5 48
7
11
10
9 4 1
New
New
New
LT
LT
E
(9)
T R..10 Nm (1.0 m  
kg, 7.2 ft  Ib)
T R..10 Nm (1.0 m  
kg, 7.2 ft  Ib)
T R..12 Nm (1.2 m  
kg, 8.7 ft  Ib)
T R..70 Nm (7.0 m  
kg, 50 ft  lb)
E
E 

GENERATOR AND STARTER CLUTCH
5-29
EAS24500
INSTALLING THE GENERATOR
1. Install:
•Generator rotor
•Washer 
•Generator rotor bolt
NOTE:
•Clean the tapered portion of the crankshaft and 
the generator rotor hub.
•Lubricate the generator rotor bolt threads and 
washer mating surfaces with engine oil.
2. Tighten:
•Generator rotor bolt “1”
NOTE:
While holding the generator rotor “2” with the 
sheave holder “3”, tighten the generator rotor 
bolt.
3. Apply:
•Sealant
(onto the stator coil assembly lead grommet)
T...

PICKUP ROTOR
5-30
EAS24520
PICKUP ROTOR
Removing the pickup rotor
Order Job/Parts to remove Q’ty Remarks
Right bottom cowlingRefer to “GENERAL CHASSIS” on page 
4-1.
Fuel tank Refer to “FUEL TANK” on page 7-1.
Generator coverRefer to “GENERATOR AND STARTER 
CLUTCH” on page 5-26.
1 Clutch cable 1 Disconnect.
2 Crankshaft position sensor coupler 1 Disconnect.
3 Pickup rotor cover 1
4 Pickup rotor cover gasket 1
5 Crankshaft position sensor 1
6 Pickup rotor 1
For installation, reverse the removal proce-...

PICKUP ROTOR
5-31
EAS24530
REMOVING THE PICKUP ROTOR
1. Remove:
•Pickup rotor bolt “1”
•Washer
•Pickup rotor
NOTE:
While holding the generator rotor “2” with the ro-
tor sheave holder “3”, loosen the pickup rotor 
bolt.
EAS24540
INSTALLING THE PICKUP ROTOR
1. Install:
•Pickup rotor “1”
•Washer
•Pickup rotor bolt
NOTE:
When installing the pickup rotor, align the 
groove “a” in the crankshaft with the projection 
“b” on the pickup rotor.2. Tighten:
•Pickup rotor bolt “1”
NOTE:
While holding the generator...