Yamaha 2007 R6 Service

CAMSHAFTS
5-12
NOTE:
Prior to installing the timing chain tensioner rod, 
drain the engine oil from the timing chain ten-
sioner housing.



 
 
 








 
 



 
 



 
 







a. Install the timing chain tensioner springs, tim-
ing chain tensioner spring seat, and timing 
chain tensioner rod “1”.
b. Squeeze the timing chain tensioner clip “2”, 
and then push the timing chain tensioner rod 
“3” into the timing chain tensioner housing.
NOTE:
Do not release the timing chain tensioner clip 
while pushing...

CAMSHAFTS
5-13
2. Install:
•Timing chain “1”
•Exhaust camshaft “2”
•Intake camshaft “3”
(with the camshaft sprockets temporarily 
tightened)
NOTE:
•Make sure the match marks “a” on the cam-
shaft sprockets are aligned with the cylinder 
head edge “b”.
•Be sure to install the timing chain so that the 
exhaust side of the chain is taut and the intake 
side is slack.
3. Install:
•Intake camshaft caps
•Exhaust camshaft caps
NOTE:
•Make sure each camshaft cap is installed in its 
original place. Refer to the...

CAMSHAFTS
5-14
6. Rotate the crankshaft a few times to release 
the timing chain tensioner rod.
NOTE:
If the engine is not disassembled, set the engine 
stop switch to “”, and then crank the engine a 
few times by pressing the start switch for approx-
imately 0.5–1.0 second each time.
7. Check that the timing chain is taut. If the 
chain is slack, reinstall the timing chain ten-
sioner.
NOTE:
If the engine is not disassembled, start the en-
gine and check for any abnormal noise. If any 
abnormal noise is...

CYLINDER HEAD
5-15
EAS24100
CYLINDER HEAD
Removing the cylinder head
Order Job/Parts to remove Q’ty Remarks
Engine Refer to “ENGINE REMOVAL” on page 5-1.
Camshafts Refer to “CAMSHAFTS” on page 5-7.
1 Coolant temperature sensor 1
2 Cylinder head 1
3 Cylinder head gasket 1
4 Dowel pin 2
For installation, reverse the removal proce-
dure.
1
2
3
4
T R..1st   25 Nm (2.5 m • 
kg, 18 ft • lb)
2nd  42 Nm (4.2 m 
• 
kg, 30 ft • lb)T R..1st   30 Nm (3.0 m • 
kg, 22 ft • lb)
2nd  60 Nm (6.0 m 
• 
kg, 43 ft • lb)
T...

CYLINDER HEAD
5-16
EAS24120
REMOVING THE CYLINDER HEAD
1. Remove:
• Cylinder head bolts
 Cylinder head nuts
NOTE:
 Loosen the nuts, cap nuts, and bolts in de-
creasing numerical order (refer to the numbers 
in the illustration).
 Loosen each nut 1/2 of a turn at a time. After all 
of the nuts are fully loosened, remove them.
EAS24160
CHECKING THE CYLINDER HEAD
1. Eliminate:
 Combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damag-
ing or...

CYLINDER HEAD
5-17
Cylinder head cap nuts “8”, “9”
Cylinder head bolts “11”, “12”
NOTE:
Tighten the cylinder head nuts, cap nuts, and 
bolts in the proper tightening sequence as 
shown and torque them in two stages.
T R.. 
Cylinder head nut (1st)
25 Nm (2.5 m·kg, 18 ft·lb)
Cylinder head nut (final)
42 Nm (4.2 m·kg, 30 ft·lb)
T R.. 
Cylinder head cap nut (1st)
30 Nm (3.0 m·kg, 22 ft·lb)
Cylinder head cap nut (final)
60 Nm (6.0 m·kg, 43 ft·lb)
T R.. 
Cylinder head bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
862410...

VALVES AND VALVE SPRINGS
5-18
EAS24270
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order Job/Parts to remove Q’ty Remarks
Cylinder head Refer to “CYLINDER HEAD” on page 5-15.
1 Valve lifter 16
2 Valve pad 16
3 Valve cotter 32
4 Upper spring seat 16
5 Intake valve spring 8
6 Exhaust valve spring 8
7 Intake valve 8
8 Exhaust valve 8
9 Valve stem seal 16
10 Lower spring seat 16
11 Intake valve guide 8
12 Exhaust valve guide 8
For installation, reverse the removal proce-
dure.
1
2
33
4
59...

VALVES AND VALVE SPRINGS
5-19
EAS24280
REMOVING THE VALVES
The following procedure applies to all of the 
valves and related components.
NOTE:
Before removing the internal parts of the cylinder 
head (e.g., valves, valve springs, valve seats), 
make sure the valves properly seal.
1. Remove:
•Valve lifter “1”
•Valve pad “2”
NOTE:
Make a note of the position of each valve lifter 
and valve pad so that they can be reinstalled in 
their original place.
2. Check:
•Valve sealing
Leakage at the valve seat →...

VALVES AND VALVE SPRINGS
5-20
1. Measure:
•Valve-stem-to-valve-guide clearance
Out of specification → Replace the valve 
guide.
2. Replace:
•Valve guide
NOTE:
To ease valve guide removal and installation, 
and to maintain the correct fit, heat the cylinder 
head to 100 °C (212 °F) in an oven.



 
 
 








 
 



 
 



 
 







a. Remove the valve guide with the valve guide 
remover “1”.b. Install the new valve guide with the valve 
guide installer “2” and valve guide remover 
“1”.
c. After...

VALVES AND VALVE SPRINGS
5-21
         
3. Eliminate:
•Carbon deposits
(from the valve face and valve seat)
4. Check:
•Valve face
Pitting/wear → Grind the valve face.
•Valve stem end
Mushroom shape or diameter larger than the 
body of the valve stem → Replace the valve.
5. Measure:
•Valve margin thickness D “a”
Out of specification → Replace the valve.
6. Measure:
•Valve stem runout
Out of specification → Replace the valve.
NOTE:
•When installing a new valve, always...