2010 YAMAHA YZ85 tires

TABLE OF CONTENTS
LOCATION OF IMPORTANT
LABELS ............................................1-1
SAFETY INFORMATION .................. 2-1
DESCRIPTION .................................. 3-1
Left view .......................................... 3-1
Right view ........................................ 3-2
Controls and instruments ................3-3
INSTRUMENT AND CONTROL
FUNCTIONS....................................... 4-1
Handlebar switch ............................ 4-1
Clutch lever .................................... 4-1
Shift pedal ......................................4-1
Brake lever ..................................... 4-2
Brake pedal .................................... 4-2
Fuel tank cap .................................. 4-3
Fuel ................................................ 4-3
Fuel tank breather hose ................. 4-5
Fuel cock ........................................ 4-5
Starter (choke) knob ....................... 4-6
Kickstarter ......................................4-6
Seat ................................................ 4-7
Adjusting the front fork ................... 4-7
Front fork bleeding ......................... 4-9
Adjusting the shock absorber
assembly ..................................... 4-9
Removable sidestand ................... 4-12FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 5-1
OPERATION AND IMPORTANT
RIDING POINTS................................ 6-1
Starting and warming up a cold
engine ......................................... 6-1
Starting a warm engine .................. 6-1
Shifting ........................................... 6-2
Engine break-in .............................. 6-3
Parking ........................................... 6-4
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 7-1
Periodic maintenance and
lubrication chart .......................... 7-2
Checking the spark plug ................ 7-8
Transmission oil ............................. 7-9
Coolant ........................................ 7-10
Cleaning the air filter element ...... 7-12
Adjusting the carburetor ............... 7-14
Adjusting the engine idling
speed ........................................ 7-14
Adjusting the throttle cable free
play ........................................... 7-14
Tires ............................................. 7-15
Spoke wheels .............................. 7-17
Adjusting the clutch lever free
play ........................................... 7-17
Checking the front brake lever
free play .................................... 7-18Checking the shift pedal ............... 7-19
Checking the front and rear brake
pads .......................................... 7-19
Checking the brake fluid level ...... 7-20
Changing the brake fluid .............. 7-21
Drive chain slack .......................... 7-21
Cleaning and lubricating the drive
chain ......................................... 7-22
Checking and lubricating
the cables ................................. 7-23
Checking and lubricating
the throttle grip and cable ......... 7-23
Checking and lubricating
the brake and clutch levers ....... 7-23
Checking and lubricating
the brake pedal ......................... 7-24
Lubricating the swingarm pivots ... 7-24
Lubricating the rear suspension ... 7-25
Checking the front fork ................. 7-25
Checking the steering .................. 7-26
Checking the wheel bearings ....... 7-26
Supporting the motorcycle ........... 7-26
Front wheel .................................. 7-27
Rear wheel ................................... 7-28
Troubleshooting ........................... 7-29
Troubleshooting charts ................. 7-31
MOTORCYCLE CARE AND
STORAGE.......................................... 8-1
Matte color caution ......................... 8-1
Care ............................................... 8-1
U5PA88E0.book Page 1 Tuesday, June 9, 2009 8:44 AM

LOCATION OF IMPORTANT LABELS
1-6
1Familiarize yourself with the following pictograms and read the explanatory text.
**.* kPa
*.** kgf/cm²
*.* psi**.* kPa
*.** kgf/cm²
*.* psi
Read the Owner’s manual.
This unit contains high-pressure
nitrogen gas.
Mishandling can cause
explosion. Do not incinerate,
puncture or open.
Turn off the main switch after
riding to avoid draining the
battery.Use unleaded gasoline only.
Measure tire pressure when
tires are cold.
Adjust tire pressure.
Improper tire pressure can
cause loss of control.
Loss of control can result in
severe injury or death.
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SAFETY INFORMATION
2-4
2electric failure could result, which
could cause a dangerous loss of
lights or engine power.
Aftermarket Tires and Rims
The tires and rims that came with your
motorcycle were designed to match the
performance capabilities and to provide
the best combination of handling, brak-
ing, and comfort. Other tires, rims, siz-
es, and combinations may not be
appropriate. Refer to page 7-15 for tire
specifications and more information on
replacing your tires.
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FOR YOUR SAFETY – PRE-OPERATION CHECKS
5-2
5
Rear brakeCheck operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add recommended brake fluid to specified level.
Check hydraulic system for leakage.7-19, 7-20
ClutchCheck operation.
Lubricate cable if necessary.
Check lever free play.
Adjust if necessary.7-17
Throttle gripMake sure that operation is smooth.
Check cable free play.
If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.7-14, 7-23
Drive chainCheck chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary.7-21, 7-22
Wheels and tiresCheck for damage.
Check tire condition and tread depth.
Check air pressure.
Correct if necessary.
Check for loose spokes and tighten if necessary.7-15, 7-17
Shift pedalMake sure that operation is smooth.
Correct if necessary.7-19
Brake pedalMake sure that operation is smooth.
Lubricate pedal pivoting point if necessary.7-24
Brake and clutch leversMake sure that operation is smooth.
Lubricate lever pivoting points if necessary.7-23
SteeringCheck that the handlebar can be turned smoothly and has no excessive play. 7-26 ITEM CHECKS PAGE
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-6
7
EAU42011
TIP

Hydraulic brake service
Regularly check and, if necessary, correct the brake fluid levels.
√ √√
√ 24*Drive chain roller and
support guideReplace if necessary. Check for wear or damage.
√
25*Rear suspensionCheck operation and tighten if necessary.
Lubricate with
lithium-soap-based grease
.
NO. ITEM ROUTINEAfter
break-inEvery
raceEvery
third raceEvery
fifth raceAs
required
√
√
√
√ √ √
√ √√ √
√
√
√
√
√ 26*Steering headCheck operation, free play, and tighten if necessary.
Clean and lubricate with lithium-soap-based grease.
Replace bearings.
27*Tires and wheelsCheck tire air pressure, wheel runout, spokes for
looseness, and tires for wear.
Tighten sprocket bolts if necessary.
Check wheel bearings for looseness.
Lubricate wheel bearings with lithium-soap-based
grease.
Replace wheel bearings.
28*Moving parts and ca-
blesLubricate.
29*Throttle grip housing
and cableCheck operation and free play.
Adjust the throttle cable free play if necessary.
Lubricate the throttle grip housing and cable.
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-15
7 2. To increase the throttle cable free
play, turn the adjusting nut in direc-
tion (a). To decrease the throttle
cable free play, turn the adjusting
nut in direction (b).
3. Tighten the locknut.
EAU41821
Tires To maximize the performance, durabil-
ity, and safe operation of your motorcy-
cle, note the following points regarding
the specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA14381
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.

The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).


The tire air pressure must be ad-
justed in accordance with the
weight of the rider, the riding
speed, and the riding condi-
tions.
Tire inspection
The tires must be checked before each
ride.NOTICE
ECA15580


Be sure the bead stoppers are
tightened. Loose bead stoppers
will cause the tire to slip off the
rim if tire pressure is too low.
1. Locknut
2. Throttle cable free play adjusting nut
Standard tire air pressure:
Front:
100 kPa (1.00 kgf/cm², 15 psi)
Rear:
100 kPa (1.00 kgf/cm², 15 psi)
1. Tire sidewall
2. Tire tread depth
12
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-16
7


Be sure the valve stem is posi-
tioned straight. A tilted valve
stem indicates that the tire has
slipped from its original posi-
tion on the rim. Rotate the tire
so that the valve stem is posi-
tioned straight.
If the center tread depth reaches the
specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re-
place the tire immediately.
Tire information
This motorcycle is equipped with spoke
wheels and tube tires.
WARNING
EWA10461
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, which
could lead to an accident.
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
WARNING
EWA14390


Have a Yamaha dealer replace
excessively worn tires. Operat-
ing the motorcycle with exces-
sively worn tires decreases
riding stability and can lead to
loss of control.


The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.


It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-
quality product.
Minimum tire tread depth (front and
rear):
4.0 mm (0.16 in)
Front tire:
Size:
YZ85 70/100-17 40M
YZ85LW 70/100-19 42M
YZ85LWZ 70/100-19 42M
YZ85Z 70/100-17 40M
Manufacturer/model:
YZ85 DUNLOP/D739FA (ZAF)
YZ85 DUNLOP/D756F
(AUT)(BEL)(CHE)(DEU)(DNK)(ES
P)(FIN)(FRA)(GBR)(GRC)(IRL)(IT
A)(NLD)(NOR)(POL)(PRT)(SVN)(
SWE)
YZ85LW DUNLOP/D739FA (ZAF)
YZ85LW DUNLOP/D756F
(AUT)(BEL)(CHE)(DEU)(DNK)(ES
P)(FIN)(FRA)(GBR)(GRC)(IRL)(IT
A)(NLD)(NOR)(POL)(PRT)(SVN)(
SWE)
YZ85LWZ DUNLOP/D756F
YZ85Z DUNLOP/D756F
Rear tire:
Size:
YZ85 90/100-14 49M
YZ85LW 90/100-16 52M
YZ85LWZ 90/100-16 52M
YZ85Z 90/100-14 49M
Manufacturer/model:
DUNLOP/D756
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-17
7
EAU48320
Spoke wheels
WARNING
EWA10610
The wheels on this model are not de-
signed for use with tubeless tires.
Do not attempt to use tubeless tires
on this model.To maximize the performance, durabil-
ity, and safe operation of your motorcy-
cle, note the following points regarding
the specified wheels.

The wheel rims should be checked
for cracks, bends or warpage, and
the spokes for looseness or dam-
age before each ride. If any dam-
age is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair to
the wheel. A deformed or cracked
wheel must be replaced.


The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
EAU22034
Adjusting the clutch lever free
play The clutch lever free play should mea-
sure 10.0–15.0 mm (0.39–0.59 in) as
shown. Periodically check the clutch le-
ver free play and, if necessary, adjust it
as follows.
1. Slide the rubber cover back at the
clutch lever.
2. Loosen the locknut.
3. To increase the clutch lever free
play, turn the clutch lever free play
adjusting bolt in direction (a). Todecrease the clutch lever free play,
turn the adjusting bolt in direction
(b).
TIPIf the specified clutch lever free play
could be obtained as described above,
skip steps 4–7.4. Fully turn the adjusting bolt in di-
rection (a) to loosen the clutch ca-
ble.
5. Loosen the locknut further down
the clutch cable.
6. To increase the clutch lever free
play, turn the clutch lever free play
adjusting nut in direction (a). To
1. Clutch lever free play
2. Locknut (clutch lever)
3. Clutch lever free play adjusting bolt
4. Rubber cover
1
(a) 23
4
1. Locknut (clutch cable)
2. Clutch lever free play adjusting nut (clutch
cable)
U5PA88E0.book Page 17 Tuesday, June 9, 2009 8:44 AM