Yamaha Fz6n Manual

3-14
ADJUSTING THE VALVE CLEARANCE
CHK
ADJ
NOTE:
NOTE:
c. Round off the original valve pad number ac-
cording to the following table.
Last digit
Rounded value
0 or 20
55
810
EXAMPLE:
Original valve pad number 
= 148 (thickness =1.48 mm (0.058 in))
Rounded value = 150
d. Locate the rounded number of the original
valve pad and the measured valve clearance
in the valve pad selection table. The point
where the column and row intersect is the
new valve pad number.
The new valve pad number is only an approxi-...

3-15
ADJUSTING THE VALVE CLEARANCE
CHK
ADJ
NOTE:

Refer to “CAMSHAFTS” in chapter 5.

Lubricate the camshaft bearings, camshaft
lobes and camshaft journals.

First, install the exhaust camshaft.

Align the camshaft marks with the camshaft
cap marks.

Turn the crankshaft counterclockwise several
full turns to seat the parts.
g. Measure the valve clearance again.
h. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance is...

3-16
ADJUSTING THE VALVE CLEARANCE
CHK
ADJ
VALVE CLEARANCE (cold):
  0.13  0.20 mm (0.0051  0.0079 in)
Example: Installed is 175
  Measured clearance is 0.27 mm (0.0106 in)
Replace 175 pad with 185 pad
  Pad number: (example)
  Pad No.175 = 1.75 mm (0.0689 in)
  Pad No.185 = 1.85 mm (0.0728 in)
MEASURED
CLEARANCEINSTALLED PAD NUMBER
VALVE CLEARANCE (cold):
  0.23  0.30 mm (0.0091  0.0118 in)
Example: Installed is 175
  Measured clearance is 0.35 mm (0.0138 in)
Replace 175 pad with 185 pad
  Pad...

3-17
ADJUSTING THE VALVE CLEARANCE /
SYNCHRONIZING THE THROTTLE BODIESCHK
ADJ
NOTE:
NOTE:
NOTE:
7. Install:

all removed parts
For installation, reverse the removal procedure.
SYNCHRONIZING THE THROTTLE BODIES
Prior to synchronizing the throttle bodies, the
valve clearance and the engine idling speed
should be properly adjusted and the ignition tim-
ing should be checked.
1. Stand the motorcycle on a level surface.
Place the motorcycle on a suitable stand.
2. Remove:

seat
Refer to “SEAT”.

front cowling...

3-18
SYNCHRONIZING THE THROTTLE BODIES
CHK
ADJ
NOTE:
CAUTION:
NOTE: 6. Measure:

engine idling speed
Out of specification 
 Adjust.
Refer to “ADJUSTING THE ENGINE IDLING
SPEED”.
Engine idling speed
1,250  1,350 r / min
7. Adjust:

throttle body synchronization
a. With throttle body #1 as standard, adjust
throttle bodies #2, #3, and #4 using the air
screws 
1.
#1 
2, #2 3, #3 4, #4 5

After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization...

3-19
ADJUSTING THE ENGINE IDLING SPEED
CHK
ADJ
NOTE:
a
b
EAS00052
ADJUSTING THE ENGINE IDLING SPEED
Prior to adjusting the engine idling speed, the
throttle bodies synchronization should be ad-
justed properly, the air filter element should be
clean, and the engine should have adequate
compression.
1. Start the engine and let it warm up for several
minutes.
2. Check:

engine idling speed
Out of specification 
 Adjust.
Engine idling speed
1250  1350 r / min
3. Adjust:

engine idling speed
a. Turn the...

3-20
ADJUSTING THE THROTTLE CABLE FREE PLAY
CHK
ADJ
NOTE:
NOTE:
a
b
NOTE:
EAS00055
ADJUSTING THE THROTTLE CABLE FREE
PLAY
Prior to adjusting the throttle cable free play, the
engine idling speed and throttle bodies synchro-
nization should be adjusted properly.
1. Check:

throttle cable free play 
a
Out of specification 
 Adjust.
Throttle cable free play
(at the flange of the throttle grip)
3  5 mm (0.12  0.20 in)
2. Remove:

seat
Refer to “SEAT”.

front cowling inner panel (left and right)
Refer to...

3-21
ADJUSTING THE THROTTLE CABLE FREE PLAY
CHK
ADJ
a
b
WARNING
NOTE:
NOTE: Handlebar side
a. Loosen the locknut 
1.
b. Turn the adjusting nut 
2 in direction a or b
until the specified throttle cable free play is
obtained.
Direction
Throttle cable free play is
increased.
DirectionThrottle cable free play is
decreased.
c. Tighten the locknut.
4. Install:

battery assembly
Refer to “CHECKING AND CHARGING THE
BATTERY” in chapter 3.

air filter case
Refer to “AIR FILTER CASE”.

fuel tank
Refer to “FUEL...

3-22
ADJUSTING THE EXHAUST GAS VOLUME
CHK
ADJ
NOTE:
NOTE: 3. Using the “SELECT” button, select either the
Co adjustment mode (which appears as
“Co”) or the diagnosis mode (which appears
as “dIAG”)
4. After “Co” appears as a result of pressing the
“SELECT” button, simultaneously press the
“SELECT” and “RESET” buttons for 2 se-
conds or more to excute the selection.
5. Press the “SELECT” or “RESET” buttons to
select the “C1” or “C2”.
C1=“#1” and “#4”
C2=“#2” and “#3”

The adjustment cylinder appears on the...

3-23
A
B
CHECKING THE SPARK PLUGS
CHK
ADJ
CAUTION:
EAS00059
CHECKING THE SPARK PLUGS
The following procedure applies to all of the
spark plugs.
1. Remove:

radiator lower bolt 
1

radiator lower hose bracket bolt 2
2. Remove:

spark plug caps

spark plugs
ARight side #1 and #2 and #3
BLeft side #4
Before removing the spark plugs, blow away
any dirt accumulated in the spark plug wells
with compressed air to prevent it from fal-
ling into the cylinders.
3. Check:

spark plug type
Incorrect 
 Change.
Spark...