2008 YAMAHA YZ85 engine coolant

TABLE OF CONTENTS
SAFETY INFORMATION .................. 1-1
Safe riding ....................................... 1-1
Location of important labels ........... 1-4
DESCRIPTION .................................. 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments ................2-3
INSTRUMENT AND CONTROL
FUNCTIONS....................................... 3-1
Handlebar switch ............................ 3-1
Clutch lever .................................... 3-1
Shift pedal ......................................3-1
Brake lever ..................................... 3-2
Brake pedal .................................... 3-2
Fuel tank cap .................................. 3-3
Fuel ................................................ 3-3
Fuel tank breather hose ................. 3-5
Fuel cock ........................................ 3-5
Starter (choke) knob ....................... 3-6
Kickstarter ......................................3-6
Seat ................................................ 3-6
Adjusting the front fork ................... 3-7
Front fork bleeding ......................... 3-8
Adjusting the shock absorber
assembly ..................................... 3-9
Removable sidestand ................... 3-12
PRE-OPERATION CHECKS.............. 4-1
Pre-operation check list .................. 4-2OPERATION AND IMPORTANT
RIDING POINTS................................ 5-1
Starting and warming up a cold
engine ......................................... 5-1
Starting a warm engine .................. 5-1
Shifting ........................................... 5-2
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Checking the spark plug ................ 6-8
Transmission oil ............................. 6-9
Coolant ........................................ 6-10
Cleaning the air filter element ...... 6-12
Adjusting the carburetor ............... 6-14
Adjusting the engine idling
speed ........................................ 6-14
Adjusting the throttle cable free
play ........................................... 6-15
Tires ............................................. 6-15
Spoke wheels .............................. 6-17
Accessories and replacement
parts ......................................... 6-17
Adjusting the clutch lever free
play ........................................... 6-18
Checking the front brake lever
free play .................................... 6-18Checking the front and rear
brake pads ................................ 6-19
Checking the brake fluid level ...... 6-20
Changing the brake fluid .............. 6-21
Drive chain slack .......................... 6-21
Cleaning and lubricating the
drive chain ................................ 6-22
Checking and lubricating the
cables ....................................... 6-23
Checking and lubricating the
throttle grip and cable ............... 6-23
Checking and lubricating the
brake and shift pedals ............... 6-24
Checking and lubricating the
brake and clutch levers ............. 6-24
Lubricating the swingarm pivots ... 6-25
Lubricating the rear suspension ... 6-25
Checking the front fork ................. 6-25
Checking the steering .................. 6-26
Checking the wheel bearings ....... 6-27
Supporting the motorcycle ........... 6-27
Front wheel .................................. 6-28
Rear wheel ................................... 6-28
Troubleshooting ........................... 6-30
Troubleshooting charts ................. 6-31
MOTORCYCLE CARE AND
STORAGE.......................................... 7-1
Matte color caution ......................... 7-1
Care ............................................... 7-1
Storage ........................................... 7-3
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
CAUTION:
ECA10452


In order to prevent clutch slip-
page (since the transmission oil
also lubricates the clutch), do
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-rial enters the transmission.
7. Start the engine, and then let it idle
for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the cause.
EAU20070
Coolant The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM1292
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
WARNING
EWA10380
Never attempt to remove the radiatorcap when the engine is hot.
2. Remove the radiator cap and
check the coolant level in the radi-
ator.
NOTE:

The coolant level must be checked
on a cold engine since the level
varies with engine temperature.


Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
NOTE:The coolant should be at the bottom of
the radiator filler neck. The level will
change with variation of engine temper-ature.1. Radiator cap
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6 3. If the coolant is below this level,
add coolant, and then install the
radiator cap.
NOTE:
If the engine overheats, see page 6-31for further instructions.
EAUM1312
To change the coolant
1. Place the vehicle on a level sur-
face and let the engine cool if nec-
essary.
2. Place a container under the engine
to collect the used coolant.
WARNING
EWA10380
Never attempt to remove the radiatorcap when the engine is hot.
3. Remove the coolant drain bolt and
then the radiator cap to drain the
cooling system.4. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
5. Install the coolant drain bolt, and
then tighten it to the specified
torque.
NOTE:Check the washer for damage and re-place it if necessary.
6. Pour the recommended coolant
into the radiator until it is full.
1. Correct coolant level
1. Coolant drain bolt
1. Radiator cap
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Antifreeze/water mixture ratio:
1:1
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibitors
for aluminum engines
Coolant quantity:
Radiator capacity (including all
routes):
0.54 L (0.57 US qt) (0.48 Imp.qt)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
CAUTION:
ECA10471


If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.


If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion.


If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possible,
otherwise the effectiveness ofthe coolant will be reduced.
7. Install the radiator cap, start the
engine, let it idle for several min-
utes, and then turn it off.
8. Remove the radiator cap to check
the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the bottom of the
radiator filler neck, and then install
the radiator cap.9. Start the engine, and then check
the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
EAU41431
Cleaning the air filter element The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre-
quently if you are riding in unusually
wet or dusty areas.
1. Remove the seat. (See page 3-6.)
2. Remove the air filter case cover as
shown.1. Air filter case cover
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6Engine overheating
WARNING
EWAT1040


Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.


Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the de-
tent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the capwhile turning it counterclockwise, and then remove the cap.
NOTE:If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolantas soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See NOTE.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
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INDEX
AAccessories and replacement parts ..... 6-17
Air filter element, cleaning .................... 6-12BBrake and clutch levers, checking
and lubricating .................................... 6-24
Brake and shift pedals, checking
and lubricating .................................... 6-24
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever ............................................. 3-2
Brake pedal ............................................ 3-2CCables, checking and lubricating .......... 6-23
Carburetor, adjusting ............................ 6-14
Care ........................................................ 7-1
Clutch lever............................................. 3-1
Clutch lever free play, adjusting ........... 6-18
Coolant ................................................. 6-10DDrive chain, cleaning and lubricating .... 6-22
Drive chain slack .................................. 6-21EEngine break-in ...................................... 5-3
Engine idling speed .............................. 6-14
Engine, starting a warm .......................... 5-1
Engine stop button.................................. 3-1FFront and rear brake pads, checking .... 6-19
Front brake lever free play, checking ... 6-18
Front fork, adjusting ................................ 3-7
Front fork, bleeding................................. 3-8
Front fork, checking .............................. 6-25
Fuel......................................................... 3-3Fuel cock ................................................. 3-5
Fuel tank breather hose .......................... 3-5
Fuel tank cap........................................... 3-3
HHandlebar switch..................................... 3-1IIdentification numbers ............................. 9-1KKickstarter ............................................... 3-6LLabels, location of ...................................1-4MMatte color, caution .................................7-1
Model label .............................................. 9-1PParking ....................................................5-4
Part locations .......................................... 2-1
Periodic maintenance and
lubrication chart.....................................6-2
Pre-operation check list........................... 4-2RRear suspension, lubricating ................. 6-25SSafety information ...................................1-1
Seat ......................................................... 3-6
Shifting ....................................................5-2
Shift pedal ............................................... 3-1
Shock absorber assembly, adjusting ...... 3-9
Sidestand .............................................. 3-12
Spark plug, checking ...............................6-8
Specifications .......................................... 8-1
Starter (choke) knob................................ 3-6
Starting and warming up a cold
engine ................................................... 5-1Steering, checking ................................ 6-26
Storage ................................................... 7-3
Supporting the motorcycle .................... 6-27
Swingarm pivots, lubricating ................. 6-25
TThrottle cable free play, adjusting ......... 6-15
Throttle grip and cable, checking
and lubricating .................................... 6-23
Tires ...................................................... 6-15
Transmission oil ...................................... 6-9
Troubleshooting .................................... 6-30
Troubleshooting charts ......................... 6-31VVehicle identification number .................. 9-1WWheel bearings, checking..................... 6-27
Wheel (front) ......................................... 6-28
Wheel (rear) .......................................... 6-28
Wheels .................................................. 6-17
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