check engine YAMAHA YZ85 2015 User Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
7-15
7
EAU48433
Adjustin g the throttle grip free
playThe throttle grip free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, adjust it as follows.TIPThe 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).
4. Tighten the locknut and then slide the rubber cover to its original po-
sition.
EAU41825
TiresTires 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 death from loss of
control.  The tire air pressure must be
checked and a djuste d on col d
tires (i.e., when the temperature
of the tires equals the am bient
temperature).
1. Throttle grip free play
1. Locknut
2. Throttle grip free play adjusting nut
3. Rubber cover
2
3
(a)
(b)
1
U1SN83E0.book Page 15 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
7
EAU23284
Checking the steerin gWorn 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. Place a stand under the engine to raise the front wheel off the
ground. (See page 7-28 for more
information.) WARNING! To
avoi d injury, securely 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 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.
U1SN83E0.book Page 27 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-28
7
EAU24351
Supporting the motorcycleSince this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other mainte-
nance requiring the motorcycle to
stand upright. Check that the motorcy-
cle is in a stable and level position be-
fore starting any maintenance. A
strong wooden box can be placed un-
der the engine for added stability.
To service the front wheel
1. Stabilize the rear of the motorcy- cle by using a motorcycle stand
or, if an additional motorcycle
stand is not available, by placing a
jack under 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 placing a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
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”.1. Washer
2. Axle nut
U1SN83E0.book Page 28 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-32
7
EAU41495
Troubleshootin g chartsStartin g prob lems or poor en gine performance
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.
Operate the kickstarter.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.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Open the throttle halfway and operate
the kickstarter.
U1SN83E0.book Page 32 Monday, September 8, 2014 2:36 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-33
7En
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
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.
U1SN83E0.book Page 33 Monday, September 8, 2014 2:36 PM

11-1
11
INDEX
AAir filter element, cleaning .................... 7-12BBrake and clutch levers, checking and lubricating........................................... 7-24
Brake fluid, changing............................ 7-22
Brake fluid level, checking.................... 7-20
Brake lever.............................................. 4-2
Brake lever free play, checking ............ 7-19
Brake pedal ............................................ 4-3
Brake pedal, checking and lubricating........................................... 7-25CCables, checking and lubricating ......... 7-24
Carburetor, adjusting............................ 7-14
Care ........................................................ 8-1
Clutch lever............................................. 4-1
Clutch lever free play, adjusting ........... 7-18
Coolant ................................................. 7-10DDrive chain, cleaning and lubricating ... 7-23
Drive chain slack .................................. 7-22EEngine break-in ...................................... 6-3
Engine idling speed .............................. 7-14
Engine serial number ............................ 10-1
Engine, starting a warm.......................... 6-1
Engine stop switch ................................. 4-1FFront and rear brake pads, checking ... 7-20
Front fork, adjusting ............................... 4-8
Front fork, bleeding ................................ 4-9
Front fork, checking ............................. 7-26
Fuel ......................................................... 4-3 Fuel cock................................................ 4-6
Fuel tank breather hose ......................... 4-5
Fuel tank cap.......................................... 4-3
HHandlebar switch ................................... 4-1IIdentification numbers ......................... 10-1KKickstarter .............................................. 4-7LLabels, location ...................................... 1-1MMatte color, caution ............................... 8-1
Model label........................................... 10-1PParking ................................................... 6-4
Part locations ......................................... 3-1
Periodic maintenance and lubrication
chart ..................................................... 7-2RRear suspension, lubricating................ 7-25SSafety information .................................. 2-1
Seat ........................................................ 4-7
Shifting ................................................... 6-2
Shift pedal .............................................. 4-2
Shift pedal, checking ........................... 7-19
Shock absorber assembly, adjusting ... 4-10
Sidestand ............................................. 4-12
Spark plug, checking ............................. 7-8
Specifications......................................... 9-1
Starter (choke) knob............................... 4-6
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
TThrottle grip and cable, checking and
lubricating ........................................... 7-24
Throttle grip free play, adjusting ........... 7-15
Tires ...................................................... 7-15
Transmission oil ...................................... 7-9
Troubleshooting .................................... 7-31
Troubleshooting charts ......................... 7-32VVehicle identification number ............... 10-1WWheel bearings, checking .................... 7-27
Wheel (front).......................................... 7-28
Wheel (rear)........................................... 7-29
Wheels .................................................. 7-17
U1SN83E0.book Page 1 Monday, September 8, 2014 2:36 PM