wheel YAMAHA YZ85 2017 User Guide

Periodic maintenance an d a djustment
7-27
7
EAU23285
Checkin g the steerin g
Worn 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. Raise the front wheel off the ground. (See page 7-28.)
WARNING! To avoi d injury, se-
curely 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 b earings
The 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.
U1SN85E0.book Page 27 Friday, June 10, 2016 1:20 PM

Periodic maintenance an d a djustment
7-28
7
EAU75190
Supportin g the motorcycle
Since 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.
TIP
If a suitable maintenance stand is not
available, a strong wooden box can be
used instead.
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”.
3. 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 been
remove d, otherwise the brake
pa ds will be forced shut.
[ECA11073]
1. Maintenance stand (for off-road motorcycle)
1
1. Washer
2. Axle nut
U1SN85E0.book Page 28 Friday, June 10, 2016 1:20 PM

Periodic maintenance an d a djustment
7-29
7 To install the front wheel
1. Lift the wheel up between the fork legs.
TIP
Make 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
EAU56743
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.
(See page 7-28.)
3. 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.
5. Push the wheel forward, and then remove the drive chain from the
rear sprocket.
1. Wheel axle
Tightenin g torque:
Axle nut:
70 N·m (7.0 kgf·m, 51 lb·ft)1. Axle nut
2. Washer
3. Locknut
4. Drive chain slack adjusting bolt
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Periodic maintenance an d a djustment
7-30
7
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.
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 brake after the
wheel an d b rake disc have been
remove d, otherwise the brake
pa ds will b e forced shut.
[ECA11073]
To install the rear wheel
1. Insert the rear wheel between the swingarm and then install the
drive chain onto the rear sprocket. 2. Install the brake caliper and drive
chain pullers, and then install the
wheel by inserting the wheel axle
from the right 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.
5. Adjust the drive chain slack. (See page 7-21.)
6. Tighten the locknuts and the axle nut to their specified torques.
1. Wheel axle
1. Retainer
2. Slot
Tightenin g torque:
Locknut: 14 N·m (1.4 kgf·m, 10 lb·ft)
Axle nut: 90 N·m (9.0 kgf·m, 65 lb·ft)
2 1
U1SN85E0.book Page 30 Friday, June 10, 2016 1:20 PM

Motorcycle care and stora ge
8-1
8
EAU37834
Matte color caution
NOTICE
ECA15193
Some mo dels are equipped with
matte colored finished parts. Be
sure to consult a Yamaha dealer for
a d vice on what pro ducts to use be-
fore cleanin g the vehicle. Usin g a
b rush, harsh chemical prod ucts or
cleanin g compoun ds when cleanin g
these parts will scratch or damag e
their surface. Wax also shoul d not
b e applie d to any matte colored fin-
ishe d parts.
EAU41359
Care
While the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a mo-
torcycle. Frequent and proper care
does not only comply with the terms of
the warranty, but it will also keep your
motorcycle looking good, extend its
life and optimize its performance.
Before cleanin g
1. Cover the muffler outlet with a plastic bag after the engine has
cooled down.
2. Make sure that all caps and cov- ers as well as all electrical cou-
plers and connectors, including
the spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt, like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-
ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and
degreaser off with water.
Cleanin g
NOTICE
ECA17692
Avoi d using strong aci dic wheel
cleaners, especially on spoked
wheels. If such pro ducts are
use d on har d-to-remove dirt, do
not leave the cleaner on the af-
U1SN85E0.book Page 1 Friday, June 10, 2016 1:20 PM

Motorcycle care and stora ge
8-2
8 fected
area any lon ger than in-
structe d. Also, thorou ghly rinse
the area off with water, imme di-
ately dry it, an d then apply a cor-
rosion protection spray.
 Improper cleanin g can d amage
plastic parts (such as cowlin gs,
panels, etc.) an d the mufflers.
Use only a soft, clean cloth or
spon ge with water to clean
plastic. However, if the plastic
parts cannot be thorou ghly
cleaned with water, dilute d mil d
d eter gent with water may b e
use d. Be sure to rinse off any
d eter gent resi due using plenty
of water, as it is harmful to plas-
tic parts.
 Do not use any harsh chemical
prod ucts on plastic parts. Be
sure to avoi d using cloths or
spon ges which have been in
contact with stron g or a brasive
cleanin g prod ucts, solvent or
thinner, fuel (g asoline), rust re-
movers or inhi bitors, brake flui
d,
an

tifreeze or electrolyte.
 Do not use hi gh-pressure wash-
ers or steam-jet cleaners since
they cause water seepa ge an d
d eterioration in the followin g ar-
eas: seals (of wheel an d swin g-
arm bearin gs, fork an d b rakes),
electric components (couplers,
connectors, an d switches),
b reather hoses an d vents.
After normal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain or near the sea
Since sea salt is extremely corrosive,
carry out the following steps after each
ride in the rain or near the sea.
1. Clean the motorcycle with cold water and a mild detergent, after
the engine has cooled down.
NOTICE: Do not use warm wa-
ter since it increases the corro-
sive action of the salt.
[ECA10792]
2. Apply a corrosion protection spray on all metal, including chrome-
and nickel-plated, surfaces to pre-
vent corrosion.
After cleaning 1. Dry the motorcycle with a chamois or an absorbing cloth.
2. Immediately dry the drive chain and lubricate it to prevent it from
rusting.
3. Use a chrome polish to shine chrome, aluminum and stainless-
steel parts, including the exhaust
system.
4. To prevent corrosion, it is recom- mended to apply a corrosion pro-
tection spray on all metal,
including chrome- and nickel-plat-
ed, surfaces.
5. Use spray oil as a universal clean- er to remove any remaining dirt.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely before storing or covering it.
U1SN85E0.book Page 2 Friday, June 10, 2016 1:20 PM

Motorcycle care and stora ge
8-4
8 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. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap from the spark plug, and then
install the spark plug and the
spark plug cap. WARNING! To
prevent damag e or injury
from sparkin g, make sure to
g roun d the spark plu g elec-
tro des while turnin g the en-
g ine over.
[EWA10952]
5. Lubricate all control cables and
the pivoting points of all levers and
brake pedal.
6. Check and, if necessary, correct the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
7. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
TIP
Make any necessary repairs before
storing the motorcycle.
U1SN85E0.book Page 4 Friday, June 10, 2016 1:20 PM

Specifications
9-1
9
Dimensions:
Overall length:1820 mm (71.7 in) (YZ85, YZ85H)
1900 mm (74.8 in) (YZ85LW, YZ85LWH)
Overall width: 760 mm (29.9 in)
Overall height:
1125 mm (44.3 in) (YZ85, YZ85H)
1155 mm (45.5 in) (YZ85LW, YZ85LWH)
Seat height:
840 mm (33.1 in) (YZ85, YZ85H)
875 mm (34.4 in) (YZ85LW, YZ85LWH)
Wheelbase:
1255 mm (49.4 in) (YZ85, YZ85H)
1285 mm (50.6 in) (YZ85LW, YZ85LWH)
Ground clearance: 330 mm (12.99 in) (YZ85, YZ85H)
360 mm (14.17 in) (YZ85LW, YZ85LWH)
Wei ght:
Curb weight:
71 kg (157 lb) (YZ85, YZ85H)
73 kg (161 lb) (YZ85LW, YZ85LWH)
Engine:
Combustion cycle:
2-stroke
Cooling system: Liquid cooled
Number of cylinders:
Single cylinder
Displacement: 85 cm³
Bore × stroke:
47.5 × 47.8 mm (1.87 × 1.88 in)
Compression ratio:
8.1 : 1
Starting system: Kickstarter
Lubrication system: Premix lubrication
Engine oil:
Engine oil:
YAMALUBE 2R
Recommended brand: YAMALUBE
Transmission oil:
Type:Motor oil SAE 10W-30 type SE or higher or
Gear oil SAE 85W GL-3
Quantity: 0.51 L (0.54 US qt, 0.45 Imp.qt)
Coolant quantity:
Radiator (including all routes): 0.54 L (0.57 US qt, 0.48 Imp.qt)
Air filter:
Air filter element:Wet element
Fuel:
Recommended fuel:
Premium unleaded gasoline (Gasohol [E10]
acceptable)
Fuel tank capacity:
5.0 L (1.3 US gal, 1.1 Imp.gal)
Car buretor:
Type × quantity:
PWK28 × 1
Spark plu g(s):
Manufacturer/model:
NGK/BR10EG
Spark plug gap: 0.5–0.6 mm (0.020–0.024 in)
Clutch:
Clutch type:
Wet, multiple-disc
Drivetrain:
Primary reduction ratio:3.611 (65/18)
Final drive:
Chain
Secondary reduction ratio: 3.357 (47/14) (YZ85H_CAN)
3.429 (48/14) (YZ85, YZ85H_AUS/NZL)
3.714 (52/14) (YZ85LW, YZ85LWH)
Transmission type:
Constant mesh 6-speed
Gear ratio: 1st:
2.455 (27/11)
2nd: 1.882 (32/17)
3rd: 1.529 (26/17)
4th:
1.294 (22/17)
5th: 1.130 (26/23)
6th: 1.000 (25/25)
Chassis:
Frame type: Semi double cradle
U1SN85E0.book Page 1 Friday, June 10, 2016 1:20 PM

Specifications
9-2
9
Caster angle:26.0 ° (YZ85LW, YZ85LWH)
26.3 ° (YZ85, YZ85H)
Trail: 88 mm (3.5 in) (YZ85, YZ85H)
99 mm (3.9 in) (YZ85LW, YZ85LWH)
Front tire:
Type:With tube
Size:
70/100-17 40M (YZ85, YZ85H)
70/100-19 42M (YZ85LW, YZ85LWH)
Manufacturer/model:
DUNLOP/MX51F
Rear tire:
Type: With tube
Size: 90/100-14 49M (YZ85, YZ85H)
90/100-16 52M (YZ85LW, YZ85LWH)
Manufacturer/model: DUNLOP/MX51
Tire air pressure (measure d on col d
tires):
Front:
100 kPa (1.00 kgf/cm², 15 psi)
Rear:
100 kPa (1.00 kgf/cm², 15 psi)
Front wheel:
Wheel type:Spoke wheel
Rim size:
17 x 1.40 (YZ85, YZ85H)
19 x 1.40 (YZ85LW, YZ85LWH)
Rear wheel:
Wheel type:Spoke wheel
Rim size: 14 x 1.60 (YZ85, YZ85H)
16 x 1.85 (YZ85LW, YZ85LWH)
Front brake:
Type:
Hydraulic single disc brake
Specified brake fluid: DOT 4
Rear brake:
Type:
Hydraulic single disc brake
Specified brake fluid: DOT 4
Front suspension:
Type:Telescopic fork
Spring:
Coil spring
Shock absorber: Hydraulic damper
Wheel travel: 275 mm (10.8 in)
Rear suspension:
Type:Swingarm (link suspension)
Spring: Coil spring
Shock absorber: Gas-hydraulic damper
Wheel travel:
282 mm (11.1 in) (YZ85, YZ85H)
287 mm (11.3 in) (YZ85LW, YZ85LWH)
Electrical system:
Ignition system:CDI
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11-1
11
Index
A
Air filter element, cleaning .................... 7-10
B
Brake and clutch levers, checking and
lubricating ........................................... 7-24
Brake fluid, changing ............................ 7-21
Brake fluid level, checking .................... 7-20
Brake lever .............................................. 4-2
Brake lever free play, checking............. 7-18
Brake pedal............................................. 4-3
Brake pedal, checking and lubricating ........................................... 7-25
C
Cables, checking and lubricating ......... 7-23
Carburetor, adjusting ............................ 7-12
Care ........................................................ 8-1
Clutch lever ............................................. 4-1
Clutch lever free play, adjusting ........... 7-17
Coolant ................................................... 7-8
D
Drive chain, cleaning and lubricating .... 7-23
Drive chain slack................................... 7-21
E
Engine break-in....................................... 6-3
Engine idling speed .............................. 7-13
Engine serial number ............................ 10-1
Engine, starting a warm .......................... 6-2
Engine stop switch ................................. 4-1
F
Front and rear brake pads, checking.... 7-19
Front fork, adjusting................................ 4-8
Front fork, bleeding .............................. 4-10
Front fork, checking .............................. 7-26
Fuel ......................................................... 4-4
Fuel cock ................................................ 4-6
Fuel tank breather hose .......................... 4-6
Fuel tank cap .......................................... 4-3
H
Handlebar switch .................................... 4-1
I
Identification numbers .......................... 10-1
K
Kickstarter............................................... 4-7
L
Labels, location....................................... 1-1
M
Matte color, caution ................................ 8-1
P
Parking .................................................... 6-5
Part locations .......................................... 3-1 Periodic maintenance and lubrication
chart ..................................................... 7-2
R
Rear suspension, lubricating ................ 7-25
S
Safety information .................................. 2-1
Seat ........................................................ 4-8
Shifting ................................................... 6-2
Shift pedal .............................................. 4-2
Shift pedal, checking ............................ 7-18
Shock absorber assembly, adjusting ... 4-10
Sidestand ............................................. 4-13
Spark plug, checking ............................. 7-6
Specifications ......................................... 9-1
Starter (choke) knob ............................... 4-7
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
T
Throttle grip and cable, checking and lubricating .......................................... 7-24
Throttle grip free play, adjusting........... 7-13
Tires ...................................................... 7-14
Transmission oil ..................................... 7-7
Troubleshooting ................................... 7-31
Troubleshooting charts ........................ 7-32
V
Vehicle identification number ............... 10-1
W
Wheel bearings, checking .................... 7-27
Wheel (front) ......................................... 7-28
Wheel (rear) .......................................... 7-29
Wheels .................................................. 7-16
U1SN85E0.book Page 1 Friday, June 10, 2016 1:20 PM