2019 YAMAHA YZ85 lock

Instrument and control functions
4-1
4
EAU40661
Han dle bar switch
EAU53962En gine stop switch “ENGINE STOP”
Hold this switch pushed until the en-
gine stops.
EAU64023
Clutch lever
The clutch lever is located on the left
side of the handlebar. To disengage
the clutch, pull the lever toward the
handlebar grip. To engage the clutch,
release the lever. The lever should be
pulled rapidly and released slowly for
smooth clutch operation.
The clutch lever is equipped with a
clutch lever position adjusting bolt. Ad-
just the distance between the clutch le-
ver and the handlebar grip as follows. 1. Loosen the locknut.
2. While holding the clutch lever pulled slightly towards the handle-
bar grip, turn the adjusting bolt in
direction (a) to increase the dis-
tance, and in direction (b) to de-
crease it.
3. Tighten the locknut.
1. Engine stop switch “ENGINE STOP”
1. Clutch lever
2. Locknut
3. Clutch lever position adjusting bolt
4. Distance between clutch lever and handle- bar grip
4 2
13
(b)
(a)
UB4B80E0.book Page 1 Tuesday, March 27, 2018 1:39 PM

Instrument and control functions
4-2
4
EAU12875
Shift pe dal
The shift pedal is located on the left
side of the motorcycle. To shift the
transmission to a higher gear, move
the shift pedal up. To shift to the trans-
mission to a lower gear, move the shift
pedal down. (See page 6-2.)
EAU41267
Brake lever
The brake lever is located on the right
side of the handlebar. To apply the
front brake, pull the lever toward the
throttle grip.
The brake lever is equipped with a
brake lever position adjusting bolt. Ad-
just the distance between the brake le-
ver and the throttle grip as follows.
1. Slide the rubber cover toward the end of the brake lever.
2. Loosen the locknut.
3. While holding the lever pushed away from the throttle grip, turn
the adjusting bolt in direction (a) to
increase the distance, and in di-
rection (b) to decrease it.
4. Tighten the locknut.
5. Slide the rubber cover to its origi- nal position.
1. Shift pedal
1
1. Rubber cover
2. Brake lever
3. Locknut
4. Brake lever position adjusting bolt
5. Distance between brake lever and throttle grip
1
4
3
(a)
(b)
2
5
UB4B80E0.book Page 2 Tuesday, March 27, 2018 1:39 PM

Instrument and control functions
4-3
4
EAU12944
Brake ped al
The brake pedal is located on the right
side of the motorcycle. To apply the
rear brake, press down on the brake
pedal.
EAU13183
Fuel tank cap
To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it
clockwise.
WARNING
EWA11092
Make sure that the fuel tank cap is
properly close d after fillin g fuel.
Leakin g fuel is a fire hazar d.
1. Brake pedal
1
1. Fuel tank cap
1
UB4B80E0.book Page 3 Tuesday, March 27, 2018 1:39 PM

Instrument and control functions
4-6
4
EAU41362
Fuel tank breather hose
Before operating the motorcycle:
 Check the fuel tank breather hose
connection.
 Check the fuel tank breather hose
for cracks or damage, and replace
it if necessary.
 Make sure that the end of the fuel
tank breather hose is not blocked,
and clean it if necessary.
TIP
If the fuel tank breather hose falls out,
reinstall it on the fuel tank cap with the
arrow mark on the one-way valve
pointed downward as shown.
EAU41281
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has two positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not run-
ning.
ON
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
1. Fuel tank breather hose
2. One-way valve
2
1
1. Arrow mark positioned over “OFF”
1. Arrow mark positioned over “ON”
1
1
UB4B80E0.book Page 6 Tuesday, March 27, 2018 1:39 PM

Instrument and control functions
4-12
4
4. Loosen the locknut.
5. To increase the spring preload
and thereby harden the suspen-
sion, turn the adjusting nut in di-
rection (a). To decrease the spring
preload and thereby soften the
suspension, turn the adjusting nut
in direction (b).
 A special wrench can be ob-
tained at a Yamaha dealer to
make this adjustment.
 The spring preload setting is
determined by measuring
distance A, shown in the illus-
tration. The longer distance A
is, the lower the spring pre-
load; the shorter distance A
is, the higher the spring pre- load. With each complete
turn of the adjusting nut, dis-
tance A is changed by 1.5
mm (0.06 in).
6. Tighten the locknut to the speci- fied torque. NOTICE: Always
ti ghten the locknut ag ainst the
a d justin g nut, and then tighten
the locknut to the specifie d
torque.
[ECA10122]
7. Install the air filter joint in its origi- nal position, and then tighten the
clamp screw and clamp bolt.
TIP
Align the projection on the air filter joint
with the projection on the frame guide.
1. Clamp bolt
2. Clamp screw
3. Air filter joint
1. Locknut
2. Spring preload adjusting nut
1 2
3
1 2
(a)
(b)
1. Distance A
Sprin
g preloa d:
Minimum (soft): Distance A = 218.5 mm (8.60 in)
Standard: Distance A = 210.0 mm (8.27 in)
(YZ85LW, YZ85LWK)
215.0 mm (8.46 in) (YZ85, YZ85K)
Maximum (hard): Distance A = 202.0 mm (7.95 in)
Ti ghtenin g torque:
Locknut:
30 N·m (3.0 kgf·m, 22 lb·ft)
1
UB4B80E0.book Page 12 Tuesday, March 27, 2018 1:39 PM

Periodic maintenance an d a djustment
7-13
7
EAU44391
A djustin g the en gine i dlin g
spee d
The engine idling speed must be ad-
justed when necessary.
1. Start the engine and thoroughly warm it up.
2. Turn the throttle stop screw until the engine runs at the lowest pos-
sible speed.
3. To increase the engine idling speed, turn the throttle stop screw
in direction (a). To decrease the
engine idling speed, turn the throt-
tle stop screw in direction (b).
EAU48434
Adjustin g the throttle grip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, adjust it as fol-
lows.
TIP
The engine idling speed must be cor-
rectly adjusted before checking and
adjusting the throttle grip free play.
1. Slide the rubber cover back.
2. Loosen the locknut.
3. To increase the throttle grip free
play, turn the adjusting nut in di-
rection (a). To decrease the throt-
tle grip free play, turn the adjusting
nut in direction (b).
1. Throttle stop screw
1. Throttle grip free play
Throttle g rip free play:
3.0–6.0 mm (0.12–0.24 in)
UB4B80E0.book Page 13 Tuesday, March 27, 2018 1:39 PM

Periodic maintenance an d a djustment
7-14
7
4. Tighten the locknut and then slide
the rubber cover to its original po-
sition.
EAU65042
Tires
Tires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
WARNING
EWA14382
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or d eath from loss of
control.  The tire air pressure must b e
checked and a djuste d on col d
tires (i.e., when the temperature
of the tires equals the am bient
temperature).
 The tire air pressure must b e
a d juste d in accor dance with the
wei ght of the ri der, the ri din g
speed , and the ri din g con di-
tions.
1. Locknut
2. Throttle grip free play adjusting nut
3. Rubber cover
1 2
3
(a)
(b)
Standar d tire air pressure:
Front: 100 kPa (1.00 kgf/cm², 15 psi)
Rear:
100 kPa (1.00 kgf/cm², 15 psi)
UB4B80E0.book Page 14 Tuesday, March 27, 2018 1:39 PM

Periodic maintenance an d a djustment
7-17
7
EAU65775
A djustin g the clutch lever free
play
Measure the clutch lever free play as
shown.
Periodically check the clutch lever free
play and, if necessary, adjust it.
To increase the clutch lever free play,
turn the clutch lever free play adjuster
in direction (a). To decrease the clutch
lever free play, turn the adjuster in di-
rection (b).
TIP
If the specified clutch lever free play
cannot be obtained as described
above, proceed as follows.
1. Fully turn the adjuster in direction
(a) to loosen the clutch cable.
2. Slide the rubber cover and clutch lever free play adjuster back fur-
ther down the clutch cable, and
then loosen the locknut.
3. To increase the clutch lever free play, turn the clutch lever free play
adjusting bolt in direction (a). To decrease the clutch lever free
play, turn the adjusting bolt in di-
rection (b).
4. Tighten the locknut at the clutch cable.
5. Slide the clutch lever free play ad- juster and rubber cover to their
original positions, making sure to
align the slot in the adjuster with
the slot in the adjusting bolt.
1. Clutch lever free play
2. Clutch lever free play adjuster
Clutch lever free play:7.0–12.0 mm (0.28–0.47 in)
2
1 (b)
(a)
1. Locknut
2. Clutch lever free play adjusting bolt
3. Clutch lever free play adjuster
4. Rubber cover
1. Slot
4
3
2
1
(b)
(a)
1
UB4B80E0.book Page 17 Tuesday, March 27, 2018 1:39 PM