2022 YAMAHA YZ85 maintenance

Periodic maintenance an d a djustment
7-26
7
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.
EAU75190
Supportin g the motorcycleSince this model is not equipped with a
centerstand, use a maintenance stand
when removing the front or rear wheel,
adjusting the chain or washing the ve-
hicle, etc.
Check that the motorcycle is in a stable
and level position before starting any
maintenance.TIPIf a suitable maintenance stand is not
available, a strong wooden box can be
used instead.
EAU24361
Front wheel
EAU56372
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. Place the motorcycle on a suitable
stand. (See page 7-26.)
3. Remove the axle nut and washer.
4. Pull out the wheel axle.
1. Maintenance stand (for off-road motorcycle)
1
1. Washer
2. Axle nut
1 11 2
2
UB4B83E0.book Page 26 Thursday, September 9, 2021 8:47 AM

Periodic maintenance an d a djustment
7-27
7 5. 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. Make sure the brake pads have not been forced shut.
2. Lift up the wheel between the fork legs.
3. Insert the wheel axle from the right side.
4. Install the washer and axle nut.
5. Tighten the axle nut to the speci- fied torque.
EAU25081
Rear wheel
EAU84051
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. Place the motorcycle on a suitable
stand. (See page 7-26.)
1. Wheel axle
1 11
Tightenin g torque:
Axle nut:
70 N·m (7.0 kgf·m, 52 lb·ft)
1. Washer
2. Axle nut
2 2
12
1
UB4B83E0.book Page 27 Thursday, September 9, 2021 8:47 AM

Periodic maintenance an d a djustment
7-28
7
3. Loosen the locknut, and then turn
the drive chain slack adjusting bolt
in direction (a). Repeat for the oth-
er side.
4. Remove the axle nut and washer.
5. Push the wheel forward and re- move the drive chain from the rear
sprocket. 6. While supporting the brake caliper
bracket, pull out the wheel axle.
TIPA rubber mallet may be useful to
tap the wheel axle out.
 The drive chain pullers may fall out
when removing the wheel axle.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]
TIPIf the drive chain is difficult to re-
move, remove the wheel axle first. 
For easy installation, rest the drive
chain on top of the swingarm.
To install the rear wheel
1. Make sure the brake pads have not been forced shut.
2. Install the wheel, the brake caliper bracket and drive chain pullers by
inserting the wheel axle from the
left side.TIPMake sure the slot in the brake caliper
bracket is fit over the retainer on the
swingarm.3. Install the drive chain onto the rearsprocket.
1. Drive chain slack adjusting bolt
2. Locknut
3. Drive chain puller
2 2
3 (a) (a)
12
3
(a)
1
1. Wheel axle
1 11
1. Retainer
2. Slot
2 1
UB4B83E0.book Page 28 Thursday, September 9, 2021 8:47 AM

Periodic maintenance an d a djustment
7-29
7 4. Install the washer and axle nut.
5. Adjust the drive chain slack. (See
page 7-20.)
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.
UB4B83E0.book Page 29 Thursday, September 9, 2021 8:47 AM

Periodic maintenance an d a djustment
7-30
7
EAU86370
Trou bleshootin g chart
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.
Try starting the engine.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
(s).
Have a Yamaha dealer check the vehicle. The engine does not start.
Check the compression.
Open the throttle halfway and
try
starting the engine.
UB4B83E0.book Page 30 Thursday, September 9, 2021 8:47 AM

Periodic maintenance an d a djustment
7-31
7
EAU86420
En 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
reservoir and 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.
UB4B83E0.book Page 31 Thursday, September 9, 2021 8:47 AM

Motorcycle care and stora ge
8-4
8 1. Make all necessary repairs and
perform any outstanding mainte-
nance.
2. Follow all instructions in the Care Section of this chapter.
3. Fill up the fuel tank and add fuel stabilizer according to product in-
structions.
4. Run the engine for 5 minutes to distribute treated fuel through the
fuel system.
5. For vehicles with a fuel cock: Turn the fuel cock lever to the off posi-
tion.
6. For vehicles with a carburetor: To prevent fuel deposits from build-
ing up, drain the fuel in the carbu-
retor float chamber into a clean
container. Retighten the drain bolt
and pour the fuel back into the fuel
tank.
7. Use a quality engine fogging oil according to product instructions.
If engine fogging oil is not avail-
able, perform the following steps
for each cylinder:a. Remove the spark plug cap and spark plug. b. Pour a teaspoonful of engine
oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several times with the starter or kick-
starter. (This will coat the cylin-
der wall with oil.) WARNING!
To prevent d amage or injury
from sparkin g, make sure to
g roun d the spark plu g elec-
tro des while turning the en-
g ine over.
[EWA10952]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
8. Lubricate all control cables, piv- ots, levers and pedals, as well as
the sidestand and centerstand (if
equipped).
9. Check and correct the tire air pressure, and then lift the vehicle
so that all wheels are off the
ground. If maintenance stands are not available, turn the wheels a lit-
tle once a month in order to pre-
vent the tires from becoming
degraded in one spot.
10. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
11. For vehicles with a battery: Re- move and fully charge it, or attach
a maintenance charger. NOTICE:
Confirm that the battery an d its
char ger are compati ble. Do not
char ge a VRLA b attery with a
conventional char ger.
[ECA26330]
UB4B83E0.book Page 4 Thursday, September 9, 2021 8:47 AM

11-1
11
Index
AAir filter element, cleaning .................... 7-11BBrake and clutch levers, checking
and lubricating ................................... 7-23
Brake fluid, changing............................ 7-20
Brake fluid level, checking.................... 7-19
Brake lever.............................................. 4-2
Brake lever free play, checking ............ 7-17
Brake pedal ............................................ 4-3
Brake pedal, checking and lubricating........................................... 7-24CCables, checking and lubricating ......... 7-22
Carburetor, adjusting............................ 7-13
Care ........................................................ 8-1
Clutch lever............................................. 4-1
Clutch lever free play, adjusting ........... 7-16
Coolant ................................................... 7-9DDrive chain, cleaning and lubricating ... 7-22
Drive chain slack .................................. 7-20EEngine break-in ...................................... 6-1
Engine idling speed .............................. 7-13
Engine overheating ............................... 7-31
Engine serial number ............................ 10-1
Engine, starting a warm.......................... 6-3
Engine stop switch ................................. 4-1FFront and rear brake pads, checking ... 7-18
Front fork, adjusting ............................... 4-8
Front fork, bleeding .............................. 4-10
Front fork, checking ............................. 7-25 Fuel ........................................................ 4-3
Fuel cock................................................ 4-6
Fuel tank breather hose ......................... 4-6
Fuel tank cap.......................................... 4-3
HHandlebar switch ................................... 4-1IIdentification numbers ......................... 10-1KKickstarter .............................................. 4-7LLabels, location ...................................... 1-1MMatte color, caution ............................... 8-1PParking ................................................... 6-4
Part locations ......................................... 3-1
Periodic maintenance and lubrication
chart ..................................................... 7-2RRear suspension, lubricating................ 7-24SSafety defects, reporting (For CANADA customers) ......................... 10-2
Safety information .................................. 2-1
Seat ........................................................ 4-7
Shifting ................................................... 6-3
Shift pedal .............................................. 4-2
Shift pedal, checking ........................... 7-18
Shock absorber assembly, adjusting ... 4-11
Sidestand ............................................. 4-14
Spark plug, checking ............................. 7-7
Specifications......................................... 9-1
Starter (choke) knob............................... 4-7 Starting and warming up a cold
engine ................................................... 6-2
Steering, checking ................................ 7-25
Storage ................................................... 8-3
Supporting the motorcycle ................... 7-26
Swingarm pivots, lubricating ................ 7-24
TThrottle grip and cable, checking and lubricating ........................................... 7-23
Throttle grip free play, adjusting ........... 7-13
Tires ...................................................... 7-14
Transmission oil ...................................... 7-8
Troubleshooting .................................... 7-29
Troubleshooting chart........................... 7-30VVehicle identification number ............... 10-1WWheel bearings, checking .................... 7-26
Wheel (front).......................................... 7-26
Wheel (rear)........................................... 7-27
Wheels .................................................. 7-16YYPVS system ........................................ 4-14
UB4B83E0.book Page 1 Thursday, September 9, 2021 8:47 AM