torque YAMAHA YZF-R1SC 2004 User Guide

3-35
CHECKING THE EXHAUST SYSTEM
CHK
ADJ
WARNING
NOTE:
EAS00099
CHECKING THE EXHAUST SYSTEM
The following procedure applies to all of the ex-
haust pipes and gaskets.
Do not touch the muffler bracket until the ex-
haust system has cooled.
1. Check:

exhaust pipe
1

exhaust valve pipe 2

muffler 3
Cracks / damage
Replace.

gaskets
4
Exhaust gas leaks
Replace.
2. Check:

tightening torque
Exhaust pipe nut
5
20 Nm (2.0 m
kg, 14 ft
lb)
Exhaust pipe and exhaust valve
pipe bolt
6
10 Nm (1.0 m
kg, 7.2 ft
lb)
Catalyst pipe assembly bolt
7
20 Nm (2.0m
kg, 14 ft
lb)
Catalyst pipe assembly and
muffler bolt
8
20 Nm (2.0 m
kg, 14 ft
lb)
Muffler cover
9
10 Nm (1.0 m
kg, 7.2 ft
lb)
Install the EXUP cable in parallel without twist-
ing its upper
10 and lower sides 11.

black metal
10 is upper.

white metal
11 is lower.
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3-51
CHECKING AND ADJUSTING THE STEERING HEAD
CHK
ADJ
WARNING
NOTE:
NOTE:
EAS00146
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Stand the motorcycle on a level surface.
Securely support the motorcycle so that
there is no danger of it falling over.
Place the motorcycle on a suitable stand so that
the front wheel is elevated.
2. Check:

steering head
Grasp the bottom of the front fork legs and
gently rock the front fork.
Binding / looseness
Adjust the steering
head.
3. Remove:

upper bracket
Refer to “HANDLEBAR” and “STEERING
HEAD” in chapter 4.
4. Adjust:

steering head
a. Remove the lock washer
1, the upper ring
nut
2, and the rubber washer 3.
b. Loosen the lower ring nut
4 and then tighten
it to specification with a steering nut wrench
5.
Set the torque wrench at a right angle to the
steering nut wrench.
Steering nut wrench
90890-01403, YU-33975
Lower ring nut (initial tightening
torque)
52 Nm (5.2 m
kg, 38 ft
lb)
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3-52
CHECKING AND ADJUSTING THE STEERING HEAD
CHK
ADJ
WARNING
NOTE:
NOTE: c. Loosen the lower ring nut
4 completely, then
tighten it to specification.
Do not overtighten the lower ring nut.
Lower ring nut
(final tightening torque)
18 Nm (1.8 m
kg, 13 ft
lb)
d. Check the steering head for looseness or
binding by turning the front fork all the way in
both directions. If any binding is felt, remove
the under bracket and check the upper and
lower bearings.
Refer to “STEERING HEAD” in chapter 4.
e. Install the rubber washer
3.
f. Install the upper ring nut
2.
g. Finger tighten the upper ring nut
2, then
align the slots of both ring nuts. If necessary,
hold the lower ring nut and tighten the upper
ring nut until their slots are aligned.
h. Install the lock washer
1.
Make sure the lock washer tabs
a sit correctly
in the ring nut slots
b.
5. Install:

upper bracket
Refer to “HANDLEBAR” and “STEERING
HEAD” in chapter 4.
6. Measure:

steering head tension
Make sure all of the cables and wires are prop-
erly routed.
a. Point the front wheel straight ahead.
b. Install a plastic locking tie
1 loosely around
the end of the handlebar as shown.
c. Hook a spring gauge
2 onto the plastic lock-
ing tie.
d. Hold the spring gauge at a 90 angle from the
handlebar, pull the spring gauge, and then
record the measurement when the handle-
bar starts to run.
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4-71
SWINGARM AND DRIVE CHAINCHAS
WARNING
NOTE:
NOTE:
EAS00703
REMOVING THE SWINGARM
1. Stand the motorcycle on a level surface.
Securely support the motorcycle so that
there is no danger of it falling over.
Place the motorcycle on a suitable stand so that
the rear wheel is elevated.
2. Remove:

relay arm-to-swingarm bolt
1

connecting arm bolt 2

rear shock absorber assembly lower bolt 3
When removing the rear shock absorber as-
sembly lower bolt, hold the swingarm so that it
does not drop down.
3. Measure:

swingarm side play

swingarm vertical movement
a. Measure the tightening torque of the pivot
shaft nut.
Pivot shaft nut
105 Nm (10.5 m
kg, 76 ft
lb)
b. Measure the swingarm side play
A by mov-
ing the swingarm from side to side.
c. If the swingarm side play is out of specifica-
tion, check the spacers, bearings, washers,
and dust covers.
Swingarm side play
(at the end of the swingarm)
1.0 mm (0.04 in)
d. Check the swingarm vertical movement
B
by moving the swingarm up and down.
If swingarm vertical movement is not smooth
or if there is binding, check the spacers,
bearings, washers, and dust covers.
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5-20
CAMSHAFTENG
10 Nm (1.0 m
kg, 7.2 ft
lb)
NOTE:
CAUTION:
24 Nm (2.4 m
kg, 17 ft
lb)
CAUTION:
5. Install:

camshaft cap bolts
Tighten the camshaft cap bolts in stages and in
a crisscross pattern, working from the inner
caps out.

Lubricate the camshaft cap bolts with the
engine oil.

The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.

Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
6. Tighten:

camshaft sprocket bolts
1
Camshaft wrench
90890-04143
Be sure to tighten the camshaft sprocket
bolts to the specified torque to avoid the
possibility of the bolts coming loose and
damaging the engine.
7. Align:

camshaft punch mark
a
Align the camshaft punch mark a and the
camshaft cap arrow mark
b.
Camshaft wrench
90890-04143
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5-24
CYLINDER HEADENG
8 Nm (0.8 m
kg, 5.8 ft
lb)
NOTE:
NOTE:
19 Nm (1.9 m
kg, 14 ft
lb)
67 Nm (6.7 m
kg, 48 ft
lb)
12 Nm (1.2 m
kg, 8.7 ft
lb)
NOTE:
EAS00233
INSTALLING THE CYLINDER HEAD
1. Check:

cylinder head bolts
1
Retighten the cylinder head bolts to specifica-
tion, before installing the cylinder head.
2. Install:

gasket
New
1

dowel pins
3. Install:

cylinder head
Pass the timing chain through the timing chain
cavity.
4. Tighten:

cylinder head nuts
1
10
1st
2nd

cylinder head bolts
11 12

First, tighten the nuts 1
10 to approximate-
ly 19 Nm (1.9 m
kg, 14 ft
lb) with a torque
wrench, and then tighten the 67 Nm (6.7 m
kg,
48 ft
lb).

Lubricate the cylinder head nuts with engine
oil.

Tighten the cylinder head nuts in the proper
tightening sequence as shown and torque
them in two stages.
5. Install:

exhaust camshaft

intake camshaft
Refer to “INSTALLING THE CAMSHAFTS”.
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5-76
CRANKCASEENG
CAUTION:
NOTE:
3. Install:

dowel pin
4. Set the shift drum assembly and transmis-
sion gears in the neutral position.
5. Install:

lower crankcase
1
(onto the upper crankcase 2)
Before tightening the crankcase bolts, make
sure that the transmission gears shift cor-
rectly when the shift drum assembly is
turned by hand.
6. Install:

crankcase bolts

Lubricate the bolt threads with engine oil.

Install a washer on bolts
1
10 and 22.

Seal bolt
18

Tighten the bolts in the tightening sequence
cast on the crankcase.
M9  105 mm (4.1 in) bolts:
1
10
M8  60 mm (2.4 in) bolt: 11 LOCTITE
M8  60 mm (2.4 in) bolts: 12, 16
M6  70 mm (2.8 in) bolts: 19, 21, 23
M6  65 mm (2.5 in) bolts: 17, 18
M6  60 mm (2.4 in) bolts: 22, 24, 25
M6  50 mm (2.0 in) bolts: 20, 26
M8  50 mm (2.0 in) bolts: 13
15
Crankcase bolt
Bolt
1
10
1st: 20 Nm (2.0 m
kg, 14 ft
lb)
2nd*: 20 Nm (2.0 m
kg, 14 ft
lb)
3rd: +60
Bolt
11
16
24 Nm (2.4 m
kg, 17 ft
lb)
Bolt
17
26
12 Nm (1.2 m
kg, 8.7 ft
lb)
* Following the tightening order, loosen the bolt
one by one and then retighten it to the specific
torque.
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5-85
CONNECTING RODS AND PISTONSENG
WARNING
CAUTION:
l. Clean the connecting rod bolts.
m. Tighten the connecting rod bolts.
n. Put a mark
1 on the corner of the connecting
rod bolt
2 and the connecting rod 3.
o. Tighten the bolt further to reach the specified
angle (150).
p. After the installation, check that the section
shown
a is flush with each other by touching
the surface.

Side machined face
a

When the bolt is tightened more than the
specified angle, do not loosen the bolt and
then retighten it.
Replace the bolt with a new one and per-
form the procedure again.

If they are not flush with each other, remove
the connecting rod bolt and big end bear-
ing and restart from step “e”. In this case,
make sure to replace the connecting rod
bolt.

Do not use a torque wrench to tighten the
nut to the specified angle.

Tighten the bolt until it is at the specified
angles.
q. Remove the connecting rod and big end
bearings.
Refer to “REMOVING THE CONNECTING
RODS”.
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5-91
CONNECTING RODS AND PISTONSENG
WARNING
CAUTION:

When the bolt is tightened more than the
specified angle, do not loosen the bolt and
then retighten it.
Replace the bolt with a new one and per-
form the procedure again.

If they are not flush with each other, remove
the connecting rod bolt and big end bear-
ing and restart from step “9”.
In this case, make sure to replace the con-
necting rod bolt.

Do not use a torque wrench to tighten the
bolt to the specified angle.

Tighten the bolt until it is at the specified
angles.
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5-95
CRANKSHAFTENG
NOTE:
NOTE:
* Following the tightening order, loosen the bolt
one by one and then retighten it to the specific
torque.
Lubricate the crankcase bolt threads with en-
gine oil.
Refer to “CRANKCASE”.
g. Remove the lower crankcase and the crank-
shaft journal lower bearings.
h. Measure the compressed Plastigauge

width c on each crankshaft journal.
If the crankshaft-journal-to-crankshaft-jour-
nal-bearing clearance is out of specification,
select replacement crankshaft journal bear-
ings.
2. Select:

crankshaft journal bearings (J1
J5)

The numbers
A stamped into the crankshaft
web and the numbers
1 stamped into the low-
er crankcase are used to determine the re-
placement crankshaft journal bearing sizes.

“J1
J5” refer to the bearings shown in the
crankshaft illustration.

If “J1
J5” are the same, use the same size
for all of the bearings.

If the size is the same for all “J
1 to J5” one digit
for that size is indicated. (Crankcase side only)
For example, if the crankcase “J
1” and crank-
shaft web “J
1” numbers are “6” and “2” respec-
tively, then the bearing size for “J1” is:
“J
1” (crankcase) – “J1”
(crankshaft web) – 1 =
6 – 2 – 1 = 3 (brown)
CRANKSHAFT JOURNAL BEARING
COLOR CODE
0White
1Blue
2Black
3Brown
4Green
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