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1. Screw (´ 4)
5. Remove the air filter case cover by
removing the screws.
6. Pull out the air filter.7. Tap the air filter lightly to remove
most of the dust and dirt. Blow out
the remaining dirt with com-
pressed air as shown. If the air fil-
ter is damaged, replace it.
8. Reassemble by reversing the re-
moval procedure.
EC000082
CAUTION:
lMake sure the air filter is prop-
erly seated in the air filter case.
lThe engine should never be run
without the air filter installed.
Excessive piston and/or cylin-
der wear may result.
EAU00630
Carburetor adjustment
The carburetors are important parts of
the engine and require very sophisti-
cated adjustment. Most adjustments
should be left to a Yamaha dealer who
has the professional knowledge and
experience to do so. However, the idle
speed may be adjusted by the owner
as part of routine maintenance.
EC000095
CAUTION:
The carburetors were set at the
Yamaha factory after many tests. If
they are changed, poor engine per-
formance and damage may result.
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1. Throttle stop screw
EAU00632
Idle speed adjustment
1. Start the engine and warm it up for
a few minutes at approximately
1,000 to 2,000 r/min. Occasionally
rev the engine to 4,000 to
5,000 r/min. The engine is warm
when it quickly responds to the
throttle.
2. Set the idle to the specified engine
speed by adjusting the throttle
stop screw. Turn the screw in di-
rectiona
to increase engine
speed and in direction b
to de-
crease engine speed.
NOTE:
If the specified idle speed cannot be
obtained by performing the above ad-
justment, consult a Yamaha dealer.Standard idle speed:
1,200 ~ 1,300 r/min
a. Free play
EAU00635
Throttle cable free play
inspection
There should be a free play of 3 ~
5 mm at the throttle grip. If the free play
is incorrect, ask a Yamaha dealer to
make this adjustment.
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EAU00637
Valve clearance adjustment
The correct valve clearance changes
with use, resulting in improper fuel/air
supply or engine noise. To prevent this,
the valve clearance must be adjusted
regularly. This adjustment however,
should be left to a professional
Yamaha service technician.
EAU00647
Tires
To ensure maximum performance,
long service, and safe operation, note
the following:
Tire air pressure
Always check and adjust the tire pres-
sure before operating the motorcycle.
EW000082
Tire inflation pressure should be
checked and adjusted when the
temperature of the tire equals the
ambient air temperature. Tire infla-
tion pressure must be adjusted ac-
cording to total weight of cargo,
rider, passenger, and accessories
(fairing, saddlebags, etc. if approved
for this model), and vehicle speed.
Maximum load* XJ600S: 184 kg
XJ600N: 187 kg
Cold tire pressure Front Rear
Up to 90 kg*200 kPa
(2.00 kg/cm
2,
2.00 bar)225 kPa
(2.25 kg/cm2,
2.25 bar)
90 kg load ~
Maximum load*200 kPa
(2.00 kg/cm
2,
2.00 bar)250 kPa
(2.50 kg/cm2,
2.50 bar)
High speed riding200 kPa
(2.00 kg/cm
2,
2.00 bar)250 kPa
(2.50 kg/cm2,
2.50 bar)
* Load is the total weight of cargo, rider, passenger
and accessories.
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1. Axle nut
2. Locknut
3. Adjusting nut
4. Alignment marks
EAU00762
Drive chain slack adjustment
1. Loosen the axle nut.
2. Loosen the locknuts on each side.
To tighten the chain, turn the chain
adjusting nuts in direction a
. To
loosen the chain, turn the adjust-
ing nuts in direction b
and push
the wheel forward. Turn each ad-
justing nut exactly the same
amount to maintain correct axle
alignment. There are marks oneach side of the swingarm. Use
these marks to align the rear
wheel.
EC000096
CAUTION:
Too little chain slack will overload
the engine and other vital parts.
Keep the slack within the specified
limits.
3. After adjusting, tighten the lock-
nuts. Then tighten the axle nut to
the specified torque.
Tightening torque:
Axle nut:
105 Nm (10.5 mákg)
EAU00769
Drive chain lubrication
The chain consists of many parts which
work with each other. If the chain is not
maintained properly, it will wear out
quickly. Therefore, the chain must be
serviced regularly. This service is es-
pecially necessary when riding in dusty
areas. This motorcycle is equipped
with a sealed type chain. Steam clean-
ing, high-pressure washes, and sol-
vents can damage chain so do not use
these for cleaning it. Use only kerosene
to clean the drive chain. Wipe it dry,
and thoroughly lubricate it with SAE 30
~ 50W motor oil. Do not use any other
lubricants on the drive chain. They may
contain solvents that could damage the
sealed chain.
EC000097
CAUTION:
Be sure to oil the chain after wash-
ing the motorcycle or riding in the
rain.
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EAU02962
Cable inspection and
lubrication
EW000112
Damage to the outer housing of ca-
bles may lead to internal rusting and
interfere with the cable movement.
Replace damaged cables as soon as
possible to prevent unsafe condi-
tions.
Lubricate the cables and cable ends. If
a cable does not operate smoothly, ask
a Yamaha dealer to replace it.
Recommended lubricant:
Engine oil
EAU00773
Throttle cable and grip
lubrication
The throttle twist grip assembly should
be greased at the time that the cable is
lubricated, since the grip must be re-
moved to get at the end of the throttle
cable. After removing the screws, hold
the end of the cable up in the air and
put in several drops of lubricant. With
the throttle grip disassembled, coat the
metal surface of the grip assembly with
a suitable all-purpose grease.
EAU02984
Brake and shift pedal
lubrication
Lubricate the pivoting parts.
Recommended lubricant:
Engine oil
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EAU02985
Brake and clutch lever
lubrication
Lubricate the pivoting parts.
Recommended lubricant:
Engine oil
EAU02965
Center and sidestand
lubrication
Lubricate the pivoting and mating
joints.
Check to see that the center and side-
stand move up and down smoothly.
EW000114
If the center and/or sidestand does
not move smoothly, consult a
Yamaha dealer.Recommended lubricant:
Engine oil
EAU00790
Rear suspension lubrication
Lubricate the pivoting parts.
Recommended lubricant:
Molybdenum disulfide grease
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EAU02939
Front fork inspection
Visual checkEW000115
Securely support the motorcycle so
there is no danger of it falling over.
Check for scratches or damage on the
inner tube and excessive oil leakage
from the front fork.
Operation check
1. Place the motorcycle on a level
place.
2. Hold the motorcycle in an upright
position and apply the front brake.
3. Push down hard on the handle-
bars several times and check if the
fork rebounds smoothly.
EC000098
CAUTION:
If any damage or unsmooth move-
ment is found with the front fork,
consult a Yamaha dealer.
EAU00794
Steering inspection
Periodically inspect the condition of the
steering. Worn out or loose steering
bearings may be dangerous. Place a
stand under the engine to raise the
front wheel off the ground. Hold the
lower end of the front forks and try to
move them forward and backward. If
any free play can be felt, ask a Yamaha
dealer to inspect and adjust the steer-
ing. Inspection is easier if the front
wheel is removed.
EW000115
Securely support the motorcycle so
there is no danger of it falling over.
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EAU01297
Troubleshooting chart
EW000125
Never check the fuel system while smoking or in the vicinity of an open flame.
Check if there is fuel
in the fuel tank.
1. FuelEnough fuel.
No fuel.Go to compression check.
Supply fuel.
Use the electric starter.
2. CompressionThere is compression.
No compression.Go to ignition check.
Ask a Yamaha dealer to
inspect.
Remove spark
plugs and
check electrodes.
3. IgnitionWet.
Dry.Wipe clean with dry cloth and correct
spark gap or replace spark plugs.
Ask a Yamaha dealer to inspect.
Engine doesnÕt start, go to battery
check.
Open throttle half-way and start
the engine.
Use the electric starter.
4. BatteryEngine turns over
quickly.
Engine turns over
slowly.Battery good.
Check connections or
recharge.
Engine doesnÕt start, ask a Yamaha
dealer to inspect.
Engine doesnÕt start, go to compression check.
