wheel YAMAHA YZ85 2007 User Guide

PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
CAUTION:
ECA10590
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-pair it.
EAU23280
Checking the steering 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 pe-
riodic maintenance and lubrication
chart.
1. Place a stand under the engine to
raise the front wheel off the
ground.
WARNING
EWA10750
Securely support the vehicle so thatthere is no danger of it falling over.
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 steering.
U5PA85E0.book Page 25 Thursday, April 13, 2006 3:06 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
6
EAU23290
Checking the wheel bearings 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.
EAU24350
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up-
right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der 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 placinga jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
U5PA85E0.book Page 26 Thursday, April 13, 2006 3:06 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-27
6
EAU24360
Front wheel
EAU41340
To remove the front wheel
WARNING
EWA10820


It is advisable to have a Yamaha
dealer service the wheel.


Securely support the motor-
cycle so that there is no dangerof it falling over.
1. Loosen the axle nut.
2. Lift the front wheel off the ground
according to the procedure on
page 6-26.
3. Remove the axle nut and washer.4. Pull the wheel axle out, and then
remove the wheel.
EAU41420
To install the front wheel
1. Lift the wheel up between the fork
legs.
2. Insert the wheel axle from the right
side.
3. Lower the front wheel so that it is
on the ground.
4. Install the washer and axle nut,
and then tighten the axle nut to the
specified torque.
EAU25080
Rear wheel
EAU41310
To remove the rear wheel
WARNING
EWA10820


It is advisable to have a Yamaha
dealer service the wheel.


Securely support the motor-
cycle so that there is no dangerof it falling over.
1. Loosen the axle nut.
2. Lift the rear wheel off the ground
according to the procedure on
page 6-26.
3. Loosen the locknut and drive chain
adjusting bolt on each side of the
swingarm.
4. Remove the axle nut and washer.
1. Washer
2. Axle nut
1. Wheel axle
Tightening torque:
Axle nut:
70 Nm (7.0 m·kgf, 50 ft·lbf)
U5PA85E0.book Page 27 Thursday, April 13, 2006 3:06 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
65. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
NOTE:

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 cannot be disas-sembled.
6. While supporting the brake caliper
and slightly lifting the wheel, pull
the wheel axle out.
NOTE:
A rubber mallet may be useful to tap thewheel axle out.
7. Remove the wheel.CAUTION:
ECA11070
Do not apply the brake after the
wheel has been removed together
with the brake disc, otherwise thebrake pads will be forced shut.
EAU41320
To install the rear wheel
1. Install the wheel and the brake cal-
iper bracket by inserting the wheel
axle from the right-hand side.
NOTE:

Make sure that the retainer on the
swingarm is inserted into the slot in
the brake caliper bracket.


Make sure that there is enough
space between the brake pads be-fore installing the wheel.
2. Install the drive chain onto the rear
sprocket.
3. Install the washer and axle nut,
and then lower the rear wheel so
that it is on the ground.
4. Adjust the drive chain slack. (See
page 6-20.)
5. Tighten the axle nut to the speci-
fied torque.
1. Axle nut
2. Washer
3. Locknut
4. Drive chain slack adjusting bolt
1. Wheel axle
1. Retainer
2. Slot
U5PA85E0.book Page 28 Thursday, April 13, 2006 3:06 PM

MOTORCYCLE CARE AND STORAGE
7-1
7
EAU41351
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 motor-
cycle. 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 cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers
as well as all electrical couplers
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 de-
greaser off with water.
Cleaning
CAUTION:
ECA10770


Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.


Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge
with mild detergent and water to
clean plastic.


Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasivecleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.


Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.


For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield is
scratched, use a quality plastic
polishing compound afterwashing.
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

MOTORCYCLE CARE AND STORAGE
7-3
7
EAU41511
Storage Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.CAUTION:
ECA10810


Storing the motorcycle in a
poorly ventilated room or cover-
ing it with a tarp, while it is still
wet, will allow water and humid-
ity to seep in and cause rust.


To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-cals are stored.
Long-term
Before storing your motorcycle for sev-
eral months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. For motorcycles equipped with a
fuel cock that has an “OFF” posi-
tion: Turn the fuel cock lever to
“OFF”.3. Drain the fuel tank and fuel lines,
and the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up.
4. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
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. (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
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turningthe engine over.
5. Lubricate all control cables and the
pivoting points of all levers and
pedals.
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.NOTE:Make any necessary repairs beforestoring the motorcycle.
U5PA85E0.book Page 3 Thursday, April 13, 2006 3:06 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
YZ85 1818 mm (71.6 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85 1821 mm (71.7 in) (ZAF)
YZ85LW 1903 mm (74.9 in)
YZ85LWW 1903 mm (74.9 in)
YZ85W 1818 mm (71.6 in)
YZ85W1 1818 mm (71.6 in)
Overall width:
758 mm (29.8 in)
Overall height:
YZ85 1161 mm (45.7 in)
YZ85LW 1205 mm (47.4 in)
YZ85LWW 1205 mm (47.4 in)
YZ85W 1161 mm (45.7 in)
YZ85W1 1161 mm (45.7 in)
Seat height:
YZ85 864 mm (34.0 in)
YZ85LW 904 mm (35.6 in)
YZ85LWW 904 mm (35.6 in)
YZ85W 864 mm (34.0 in)
YZ85W1 864 mm (34.0 in)
Wheelbase:
YZ85 1255 mm (49.4 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85 1258 mm (49.5 in) (ZAF)
YZ85LW 1286 mm (50.6 in)YZ85LWW 1286 mm (50.6 in)
YZ85W 1255 mm (49.4 in)
YZ85W1 1255 mm (49.4 in)
Ground clearance:
YZ85 351 mm (13.82 in)
YZ85LW 393 mm (15.47 in)
YZ85LWW 393 mm (15.47 in)
YZ85W 351 mm (13.82 in)
YZ85W1 351 mm (13.82 in)
Weight:With oil and fuel:
YZ85 71.0 kg (157 lb)
YZ85LW 73.9 kg (163 lb)
YZ85LWW 73.9 kg (163 lb)
YZ85W 71.0 kg (157 lb)
YZ85W1 71.0 kg (157 lb)Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
84.7 cm³ (5.17 cu.in)
Bore × stroke:
47.5 × 47.8 mm (1.87 × 1.88 in)
Compression ratio:
8.20 :1
Starting system:
Kickstarter
Lubrication system:
PremixEngine oil:Type:
YAMALUBE 2-R
Transmission oil:Type:
YAMALUBE 4 (10W30) or SAE10W30 type
SE motor oil
Oil change quantity:
0.50 L (0.53 US qt) (0.44 Imp.qt)Cooling system:Radiator capacity (including all routes):
0.54 L (0.57 US qt) (0.48 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
5.0 L (1.32 US gal) (1.10 Imp.gal)Carburetor:Manufacturer:
KEIHIN
Type × quantity:
PWK28 x 1Spark plug (s):Manufacturer/model:
NGK/BR10EG
Spark plug gap:
0.5–0.6 mm (0.020–0.024 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction system:
Spur gear
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

SPECIFICATIONS
8-2
8
Primary reduction ratio:
65/18 (3.611)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
YZ85 47/14 (3.357) (ZAF)
YZ85 48/14 (3.428)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85LW 52/14 (3.714)
YZ85LWW 52/14 (3.714)
YZ85W 47/14 (3.357)
YZ85W1 48/14 (3.428)
Transmission type:
Constant mesh 6-speed
Operation:
Left foot operation
Gear ratio:
1st:
27/11 (2.454)
2nd:
32/17 (1.882)
3rd:
26/17 (1.529)
4th:
22/17 (1.294)
5th:
26/23 (1.130)
6th:
25/25 (1.000)Chassis:Frame type:
Semi double cradleCaster angle:
YZ85 26.30 °
YZ85LW 26.90 °
YZ85LWW 26.90 °
YZ85W 26.30 °
YZ85W1 26.30 °
Trail:
YZ85 88.0 mm (3.46 in)
YZ85LW 105.5 mm (4.15 in)
YZ85LWW 105.5 mm (4.15 in)
YZ85W 88.0 mm (3.46 in)
YZ85W1 88.0 mm (3.46 in)
Front tire:Type:
With tube
Size:
YZ85 70/100-17 40M
YZ85LW 70/100-19 42M
YZ85LWW 70/100-19 42M
YZ85W 70/100-17 40M
YZ85W1 70/100-17 40M
Manufacturer/model:
YZ85 DUNLOP/D739FA (ZAF)
YZ85 DUNLOP/D756F
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85LW DUNLOP/D756F
YZ85LWW DUNLOP/D756F
YZ85W DUNLOP/D756F
YZ85W1 DUNLOP/D756FRear tire:Type:
With tubeSize:
YZ85 90/100-14 49M
YZ85LW 90/100-16 52M
YZ85LWW 90/100-16 52M
YZ85W 90/100-14 49M
YZ85W1 90/100-14 49M
Manufacturer/model:
DUNLOP/D756
Tire air pressure (measured on cold
tires):
Front:
100 kPa (15 psi) (1.00 kgf/cm²)
Rear:
100 kPa (15 psi) (1.00 kgf/cm²)
Front wheel:Wheel type:
Spoke wheel
Rim size:
YZ85 17x1.40
YZ85LW 19x1.40
YZ85LWW 19x1.40
YZ85W 17x1.40
YZ85W1 17x1.40Rear wheel:Wheel type:
Spoke wheel
Rim size:
YZ85 14x1.60
YZ85LW 16x1.85
YZ85LWW 16x1.85
YZ85W 14x1.60
YZ85W1 14x1.60
U5PA85E0.book Page 2 Thursday, April 13, 2006 3:06 PM

SPECIFICATIONS
8-3
8
Front brake:Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
275.0 mm (10.83 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
YZ85 282.0 mm (11.10 in)
YZ85LW 287.0 mm (11.30 in)
YZ85LWW 287.0 mm (11.30 in)
YZ85W 282.0 mm (11.10 in)
YZ85W1 282.0 mm (11.10 in)
Electrical system:Ignition system:
CDI
U5PA85E0.book Page 3 Thursday, April 13, 2006 3:06 PM

INDEX
AAccessories and replacement parts ..... 6-17
Air filter element, cleaning .................... 6-12BBrake and clutch levers, checking
and lubricating .................................... 6-23
Brake and shift pedals, checking
and lubricating .................................... 6-23
Brake fluid, changing ............................ 6-20
Brake fluid level, checking .................... 6-19
Brake lever ............................................. 3-2
Brake pedal ............................................ 3-2CCables, checking and lubricating .......... 6-22
Carburetor, adjusting ............................ 6-14
Care ........................................................ 7-1
Clutch lever............................................. 3-1
Clutch lever free play, adjusting ........... 6-17
Coolant ................................................. 6-10DDrive chain, cleaning and lubricating .... 6-21
Drive chain slack .................................. 6-20EEngine break-in ...................................... 5-3
Engine, starting a warm .......................... 5-1
Engine stop button.................................. 3-1FFront and rear brake pads, checking .... 6-18
Front fork, adjusting ................................ 3-7
Front fork, bleeding................................. 3-8
Front fork, checking .............................. 6-24
Fuel......................................................... 3-3
Fuel cock ................................................ 3-5
Fuel tank breather hose.......................... 3-5Fuel tank cap........................................... 3-3
HHandlebar switch..................................... 3-1IIdentification numbers ............................. 9-1KKickstarter ............................................... 3-6LLabels, location of ...................................1-4MModel label .............................................. 9-1PParking ....................................................5-4
Part locations .......................................... 2-1
Periodic maintenance and lubrication
chart ......................................................6-2
Pre-operation check list........................... 4-2RRear suspension, lubricating ................. 6-24SSafety 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 ................................................... 5-1
Steering, checking.................................6-25
Storage....................................................7-3
Supporting the motorcycle .................... 6-26Swingarm pivots, lubricating ................. 6-24
TThrottle cable free play, adjusting ......... 6-14
Throttle grip and cable, checking
and lubricating .................................... 6-22
Tires ...................................................... 6-15
Transmission oil ...................................... 6-9
Troubleshooting .................................... 6-29
Troubleshooting charts ......................... 6-30VVehicle identification number .................. 9-1WWheel bearings, checking..................... 6-26
Wheel (front) ......................................... 6-27
Wheel (rear) .......................................... 6-27
Wheels .................................................. 6-17
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM