2007 YAMAHA YZ85 transmission

TABLE OF CONTENTS
SAFETY INFORMATION .................. 1-1
Location of important labels ........... 1-4
DESCRIPTION .................................. 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments ................2-3
INSTRUMENT AND CONTROL
FUNCTIONS....................................... 3-1
Handlebar switch ............................ 3-1
Clutch lever .................................... 3-1
Shift pedal ......................................3-1
Brake lever ..................................... 3-2
Brake pedal .................................... 3-2
Fuel tank cap .................................. 3-3
Fuel ................................................ 3-3
Fuel tank breather hose ................. 3-5
Fuel cock ........................................ 3-5
Starter (choke) knob ....................... 3-6
Kickstarter ......................................3-6
Seat ................................................ 3-6
Adjusting the front fork ................... 3-7
Front fork bleeding ......................... 3-8
Adjusting the shock absorber
assembly ..................................... 3-9
Removable sidestand ................... 3-12
PRE-OPERATION CHECKS.............. 4-1
Pre-operation check list .................. 4-2OPERATION AND IMPORTANT
RIDING POINTS................................ 5-1
Starting and warming up a cold
engine ......................................... 5-1
Starting a warm engine .................. 5-1
Shifting ........................................... 5-2
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Checking the spark plug ................ 6-8
Transmission oil ............................. 6-9
Coolant ........................................ 6-10
Cleaning the air filter element ...... 6-12
Adjusting the carburetor ............... 6-14
Adjusting the throttle cable
free play .................................... 6-14
Tires ............................................. 6-15
Spoke wheels .............................. 6-17
Accessories and replacement
parts ......................................... 6-17
Adjusting the clutch lever
free play .................................... 6-17
Checking the front and rear brake
pads .......................................... 6-18
Checking the brake fluid level ...... 6-19
Changing the brake fluid .............. 6-20
Drive chain slack .......................... 6-20Cleaning and lubricating the
drive chain ................................ 6-21
Checking and lubricating the
cables ....................................... 6-22
Checking and lubricating the
throttle grip and cable ............... 6-22
Checking and lubricating the
brake and shift pedals ............... 6-23
Checking and lubricating the
brake and clutch levers ............. 6-23
Lubricating the swingarm pivots ... 6-24
Lubricating the rear suspension ... 6-24
Checking the front fork ................. 6-24
Checking the steering .................. 6-25
Checking the wheel bearings ....... 6-26
Supporting the motorcycle ........... 6-26
Front wheel .................................. 6-27
Rear wheel ................................... 6-27
Troubleshooting ........................... 6-29
Troubleshooting charts ................. 6-30
MOTORCYCLE CARE AND
STORAGE.......................................... 7-1
Care ............................................... 7-1
Storage ........................................... 7-3
SPECIFICATIONS ............................ 8-1
CONSUMER INFORMATION............ 9-1
Identification numbers .................... 9-1
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

1-1
1
SAFETY INFORMATION
EAU41460
Safe riding

Always make pre-operation
checks. Careful checks may help
prevent an accident.


This motorcycle is designed for off-
road use only, therefore, it is illegal
to operate it on public streets,
roads, or highways, even a dirt or
gravel one. Off-road use on public
lands may be illegal. Please check
local regulations before riding.


This motorcycle is designed to car-
ry the operator only. No passen-
gers.


Many accidents involve inexperi-
enced operators.
Make sure that the operator is
qualified and that you only lend
your motorcycle to other quali-
fied operators.
Know your skills and limits.
Staying within your limits may
help you to avoid an accident.


Many accidents have been caused
by error of the motorcycle opera-
tor. A typical error made by the op-
erator is veering wide on a turn
due to EXCESSIVE SPEED or un-dercornering (insufficient lean an-
gle for the speed). Never travel
faster than warranted by condi-
tions.


Ride cautiously in unfamiliar ar-
eas. You may encounter hidden
obstacles that could cause an ac-
cident.


The posture of the operator is im-
portant for proper control. The op-
erator should keep both hands on
the handlebar and both feet on the
operator footrests during operation
to maintain control of the motor-
cycle.


Never ride under the influence of
alcohol or other drugs.


Be sure the transmission is in neu-
tral before starting the engine.
Protective apparel
The majority of fatalities from motor-
cycle accidents are the result of head
injuries. The use of a safety helmet is
the single most critical factor in the pre-
vention or reduction of head injuries.


Always wear an approved helmet.


Wear a face shield or goggles.
Wind in your unprotected eyes
could contribute to an impairment
of vision that could delay seeing a
hazard.


The use of a jacket, heavy boots,
trousers, gloves, etc., is effective in
preventing or reducing abrasions
or lacerations.


Never wear loose-fitting clothes,
otherwise they could catch on the
control levers, footrests, or wheels
and cause injury or an accident.


Never touch the engine or exhaust
system during or after operation.
They become very hot and can
cause burns. Always wear protec-
tive clothing that covers your legs,
ankles, and feet.
Modifications
Modifications made to this motorcycle
not approved by Yamaha, or the re-
moval of original equipment, may ren-
der the motorcycle unsafe for use and
may cause severe personal injury.
Modifications may also make your
motorcycle illegal to use.
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

DESCRIPTION
2-2
2
EAU10420
Right view1. Shock absorber assembly compression damping force adjusting screw
(page 3-9)
2. Kickstarter (page 3-6)
3. Front fork rebound damping force adjusting screw (page 3-7)
4. Bleed screw (page 3-8)
5. Front fork compression damping force adjusting screw (page 3-7)
6. Spark plug cap (page 6-8)
7. Oil filler cap (page 6-9)
8. Coolant drain bolt (page 6-11)9. Transmission oil drain bolt (page 6-9)
10.Brake pedal (page 3-2)
11.Shock absorber assembly rebound damping force adjusting screw
(page 3-9)U5PA85E0.book Page 2 Thursday, April 13, 2006 3:06 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU40660
Handlebar switch
EAU12670
“ENGINE STOP” button
Hold this button pushed until the engine
stops in case of an emergency, such as
when the vehicle overturns or when the
throttle cable is stuck.
EAU12850
Clutch lever The clutch lever is located at the left
handlebar grip. To disengage the
clutch, pull the lever toward the handle-
bar grip. To engage the clutch, release
the lever. The lever should be pulled
rapidly and released slowly for smooth
clutch operation.
EAU12870
Shift pedal The shift pedal is located on the left
side of the engine and is used in com-
bination with the clutch lever when
shifting the gears of the 6-speed con-
stant-mesh transmission equipped on
this motorcycle.
1. Engine stop button “ENGINE STOP”
1. Clutch lever
1. Shift pedal
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
EAU13640
Starter (choke) knob Starting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the knob in direction (a) to turn on
the starter (choke).
Move the knob in direction (b) to turn off
the starter (choke).
EAU13650
Kickstarter To start the engine, fold out the kick-
starter lever, move it down lightly with
your foot until the gears engage, and
then push it down smoothly but force-
fully. This model is equipped with a pri-
mary kickstarter, allowing the engine to
be started in any gear if the clutch is
disengaged. However, shifting the
transmission into the neutral position
before starting is recommended.
EAU13960
Seat To remove the seat
Remove the bolts, and then pull the
seat off.
To install the seat
1. Insert the projections on the front
of the seat into the seat holders as
shown.
1. Starter (choke) knob
1. Kickstarter lever
1. Bolt
U5PA85E0.book Page 6 Thursday, April 13, 2006 3:06 PM

PRE-OPERATION CHECKS
4-2
4
EAU15605
Pre-operation check list
ITEM CHECKS PAGE
FuelCheck fuel level in fuel tank.
Always use a fresh mixture of gasoline and oil.
Check fuel line for leakage.3-3
Transmission oilCheck oil level in transmission case.
If necessary, add recommended oil to specified level.6-9
CoolantCheck coolant level.
If necessary, add recommended coolant to specified level.
Check cooling system for leakage.6-10
Front 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.6-18, 6-19
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.6-18, 6-19
ClutchCheck operation.
Lubricate cable if necessary.
Check lever free play.
Adjust if necessary.6-17
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.6-14, 6-22
U5PA85E0.book Page 2 Thursday, April 13, 2006 3:06 PM

OPERATION AND IMPORTANT RIDING POINTS
5-1
5
EAU41400
WARNING
EWA14610


This model is designed for off-
road use only. Become thor-
oughly familiar with all operat-
ing controls and their functions
before riding. Consult a Yamaha
dealer regarding any control or
function that you do not thor-
oughly understand.


Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.


Before starting out, make sure
that the sidestand is removed. If
the sidestand is not removed, it
will contact the ground, which
could distract the operator or af-
fect the balance of the motor-
cycle, resulting in a possibleloss of control.
EAU41300
Starting and warming up a
cold engine 1. Turn the fuel cock lever to “ON”.
2. Shift the transmission into the neu-
tral position.
3. Turn the starter (choke) on and
completely close the throttle. (See
page 3-6.)
4. Start the engine by pushing the
kickstarter lever down.CAUTION:
ECA11130
For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when theengine is cold!
5. When the engine is warm, turn the
starter (choke) off.NOTE:The engine is warm when it responds
normally to the throttle with the starter(choke) turned off.
EAU16660
Starting a warm engine Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm. Instead, start
the engine with the throttle slightly
open.NOTE:If the engine does not start after several
kicks, try again with the throttle 1/4 to1/2 open.
U5PA85E0.book Page 1 Thursday, April 13, 2006 3:06 PM

OPERATION AND IMPORTANT RIDING POINTS
5-2
5
EAU16671
Shifting Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the il-
lustration.NOTE:To shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of itstravel, and then slightly raise it.
CAUTION:
ECA10260


Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.


Always use the clutch while
changing gears to avoid damag-
ing the engine, transmission,
and drive train, which are not
designed to withstand theshock of forced shifting.
EAU16690
To start out and accelerate
1. Pull the clutch lever to disengage
the clutch.
2. Shift the transmission into first
gear.
3. Open the throttle gradually and si-
multaneously release the clutch le-
ver slowly.4. Once the motorcycle has reached
a speed high enough to change
gears, close the throttle, and at the
same time, quickly pull the clutch
lever in.
5. Shift the transmission into second
gear. (Make sure not to shift the
transmission into the neutral posi-
tion.)
6. Open the throttle halfway and
gradually release the clutch lever.
7. Follow the same procedure when
shifting to the next gear.
EAU16710
To decelerate
1. Close the throttle and apply both
the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and
shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
1. Shift pedal
2. Neutral positionU5PA85E0.book Page 2 Thursday, April 13, 2006 3:06 PM