2015 YAMAHA YZ85 maintenance

PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
7
EAU23284
Checking the steerin gWorn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Place a stand under the engine to raise the front wheel off the
ground. (See page 7-28 for more
information.) WARNING! To
avoi d injury, securely support
the vehicle so there is no dan ger
of it fallin g over.
[EWA10752]
2. Hold the lower ends of the front
fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steer-
ing.
EAU23292
Checkin g the wheel bearin gsThe front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer
check the wheel bearings.
U1SN83E0.book Page 27 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-28
7
EAU24351
Supporting the motorcycleSince this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other mainte-
nance requiring the motorcycle to
stand upright. Check that the motorcy-
cle is in a stable and level position be-
fore starting any maintenance. A
strong wooden box can be placed un-
der the engine for added stability.
To service the front wheel
1. Stabilize the rear of the motorcy- cle by using a motorcycle stand
or, if an additional motorcycle
stand is not available, by placing a
jack under the frame in front of the
rear wheel.
2. Raise the front wheel off the ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placing a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
EAU24361
Front wheel
EAU56371
To remove the front wheel
WARNING
EWA10822
To avoi
d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Loosen the axle nut.
2. Lift the front wheel off the ground
according to the procedure in the
previous section “Supporting the
motorcycle”.1. Washer
2. Axle nut
U1SN83E0.book Page 28 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-29
73. Remove the axle nut and washer.
4. Pull the wheel axle out, and then
remove the wheel. NOTICE: Do
not apply the b rake after the
wheel an d b rake disc have b een
remove d, otherwise the brake
pa ds will be forced shut.
[ECA11073]
To install the front wheel
1. Lift the wheel up between the fork legs.TIPMake sure that there is enough space
between the brake pads before install-
ing the wheel.2. Insert the wheel axle from the rightside. 3. Lower the front wheel so that it is
on the ground, install the remov-
able sidestand, and then rest the
motorcycle on it.
4. Install the washer and axle nut, and then tighten the axle nut to the
specified torque.
EAU25081
Rear wheel
EAU56741
To remove the rear wheel
WARNING
EWA10822
To avoi d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Loosen the axle nut.
2. Lift the rear wheel off the ground
according to the procedure on
page 7-28.
3. Fully loosen the locknut, and then loosen the drive chain slack ad-
justing bolt on each side of the
swingarm.
4. Remove the axle nut and washer.
1. Wheel axle
Ti ghtenin g torque:
Axle nut: 70 Nm (7.0 m·kgf, 51 ft·lbf)
U1SN83E0.book Page 29 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-30
7
5. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
TIPIf the drive chain is difficult to re-
move, remove the wheel axle first,
and then lift the wheel upward
enough to remove the drive chain
from the rear sprocket.
 The drive chain does not need to
be disassembled in order to re-
move and install the rear wheel.
6. While supporting the brake caliper
and slightly lifting the wheel, pull
the wheel axle out.TIPA rubber mallet may be useful to tap
the wheel axle out.7. Remove the wheel. NOTICE: Do
not apply the b rake after the
wheel an d b rake disc have been
remove d, otherwise the brake
pa ds will be forced shut.
[ECA11073]
To install the rear wheel
1. Install the drive chain onto the rear sprocket. 2. Install the wheel and the brake cal-
iper bracket by inserting the wheel
axle from the right-hand side.
TIPMake sure that the slot in the
brake caliper bracket is fit over the
retainer on the swingarm.
 Make sure that there is enough
space between the brake pads
before installing the wheel.3. Install the washer and axle nut.
4. Lower the rear wheel so that it is
on the ground, install the remov-
able sidestand, and then rest the
motorcycle on it.
1. Axle nut
2. Washer
3. Locknut
4. Drive chain slack adjusting bolt
1. Wheel axle
1. Retainer
2. Slot
2 1
U1SN83E0.book Page 30 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-31
75. Adjust the drive chain slack. (See
page 7-22.)
6. Tighten the locknuts and the axle nut to their specified torques.
EAU25872
Trou bleshootin gAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot lig hts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plod e, causin g severe injury or prop-
erty damag e.
Tightenin g torque:
Locknut: 16 Nm (1.6 m·kgf, 12 ft·lbf)
Axle nut:
90 Nm (9.0 m·kgf, 65 ft·lbf)
U1SN83E0.book Page 31 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-32
7
EAU41495
Troubleshootin g chartsStartin g prob lems or poor en gine performance
Check the fuel level in
the fuel tank.1. Fuel
There is
enough fuel.
There is
no fuel.
Supply fuel.Check the ignition.
The engine does not start.
Check the ignition.
Operate the kickstarter.3. Compression
There is compression.There is
no compression. The engine does not start.
Have a Yamaha dealer check the vehicle.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.2. Ignition
Wet
Dry Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Open the throttle halfway and operate
the kickstarter.
U1SN83E0.book Page 32 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-33
7En
gine overheatin g
WARNING
EWAT1041
Do not remove the ra diator cap when the en gine an d ra diator are hot. Scal din g hot flui d an d steam may be
b lown out un der pressure, which coul d cause serious injury. Be sure to wait until the en gine has coole d.
 Place a thick ra g, like a towel, over the ra diator cap, an d then slowly rotate the cap counterclockwise to the
d etent to allow any resi dual pressure to escape. When the hissin g soun d has stoppe d, press d own on the cap
while turnin g it counterclockwise, an d then remove the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended cool-
ant as 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 TIP.)
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.
U1SN83E0.book Page 33 Monday, September 8, 2014 2:36 PM

11-1
11
INDEX
AAir filter element, cleaning .................... 7-12BBrake and clutch levers, checking and lubricating........................................... 7-24
Brake fluid, changing............................ 7-22
Brake fluid level, checking.................... 7-20
Brake lever.............................................. 4-2
Brake lever free play, checking ............ 7-19
Brake pedal ............................................ 4-3
Brake pedal, checking and lubricating........................................... 7-25CCables, checking and lubricating ......... 7-24
Carburetor, adjusting............................ 7-14
Care ........................................................ 8-1
Clutch lever............................................. 4-1
Clutch lever free play, adjusting ........... 7-18
Coolant ................................................. 7-10DDrive chain, cleaning and lubricating ... 7-23
Drive chain slack .................................. 7-22EEngine break-in ...................................... 6-3
Engine idling speed .............................. 7-14
Engine serial number ............................ 10-1
Engine, starting a warm.......................... 6-1
Engine stop switch ................................. 4-1FFront and rear brake pads, checking ... 7-20
Front fork, adjusting ............................... 4-8
Front fork, bleeding ................................ 4-9
Front fork, checking ............................. 7-26
Fuel ......................................................... 4-3 Fuel cock................................................ 4-6
Fuel tank breather hose ......................... 4-5
Fuel tank cap.......................................... 4-3
HHandlebar switch ................................... 4-1IIdentification numbers ......................... 10-1KKickstarter .............................................. 4-7LLabels, location ...................................... 1-1MMatte color, caution ............................... 8-1
Model label........................................... 10-1PParking ................................................... 6-4
Part locations ......................................... 3-1
Periodic maintenance and lubrication
chart ..................................................... 7-2RRear suspension, lubricating................ 7-25SSafety information .................................. 2-1
Seat ........................................................ 4-7
Shifting ................................................... 6-2
Shift pedal .............................................. 4-2
Shift pedal, checking ........................... 7-19
Shock absorber assembly, adjusting ... 4-10
Sidestand ............................................. 4-12
Spark plug, checking ............................. 7-8
Specifications......................................... 9-1
Starter (choke) knob............................... 4-6
Starting and warming up a cold
engine .................................................. 6-1 Steering, checking ................................ 7-27
Storage ................................................... 8-3
Supporting the motorcycle ................... 7-28
Swingarm pivots, lubricating ................ 7-26
TThrottle grip and cable, checking and
lubricating ........................................... 7-24
Throttle grip free play, adjusting ........... 7-15
Tires ...................................................... 7-15
Transmission oil ...................................... 7-9
Troubleshooting .................................... 7-31
Troubleshooting charts ......................... 7-32VVehicle identification number ............... 10-1WWheel bearings, checking .................... 7-27
Wheel (front).......................................... 7-28
Wheel (rear)........................................... 7-29
Wheels .................................................. 7-17
U1SN83E0.book Page 1 Monday, September 8, 2014 2:36 PM