2008 YAMAHA TTR110 check engine

PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
NOTE:
If the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
EAU21382
Checking the throttle cable
free play The throttle cable free play should mea-
sure 4.0–6.0 mm (0.16–0.24 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21401
Valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle stop screwEngine idling speed:
1600–1800 r/min
1(a) (b)
1
1. Throttle cable free play
1
U5B680E0.book Page 14 Tuesday, July 17, 2007 9:11 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6making sure that all side plates
and rollers have been sufficiently
oiled.
EAU23091
Checking and lubricating the
cables The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING
EWA10710
Damage to the outer housing of ca-
bles may result in internal rusting
and cause interference with cable
movement. Replace damaged ca-
bles as soon as possible to preventunsafe conditions.
EAU23111
Checking and lubricating the
throttle grip and cable The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated at
the intervals specified in the periodic
maintenance chart.
Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil SAE 10W-30
U5B680E0.book Page 22 Tuesday, July 17, 2007 9:11 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
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.
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.
U5B680E0.book Page 25 Tuesday, July 17, 2007 9:11 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
6
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.
EAU24360
Front wheel
EAU41810
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 locknut at the brake le-
ver, and then turn the adjusting
bolt fully in direction (a).
2. Loosen the axle nut.
1. Brake lever free play adjusting bolt
2. Locknut
2
1
(a)
U5B680E0.book Page 28 Tuesday, July 17, 2007 9:11 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6
EAU25901
Troubleshooting chart
WARNING
EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
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.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U5B680E0.book Page 32 Tuesday, July 17, 2007 9:11 AM

MOTORCYCLE CARE AND STORAGE
7-4
7
WARNING
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turningthe engine over.
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
7. 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.
8. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
9. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30°C (90 °F)]. For more information
on storing the battery, see page
6-26.
NOTE:Make any necessary repairs beforestoring the motorcycle.
U5B680E0.book Page 4 Tuesday, July 17, 2007 9:11 AM

INDEX
AAccessories and replacement parts ..... 6-16
Air filter element, cleaning .................... 6-10BBattery .................................................. 6-26
Brake lever ............................................. 3-2
Brake lever, checking and lubricating ... 6-23
Brake lever free play, adjusting ............ 6-17
Brake pedal ............................................ 3-2
Brake pedal, checking and
lubricating ........................................... 6-23
Brake pedal free play, adjusting ........... 6-18
Brake shoes, checking ......................... 6-19CCables, checking and lubricating .......... 6-22
Carburetor, adjusting ............................ 6-13
Care ........................................................ 7-1
Clutch free play, adjusting .................... 6-17DDrive chain, cleaning and lubricating .... 6-21
Drive chain slack .................................. 6-20EEngine break-in ...................................... 5-3
Engine idling speed .............................. 6-13
Engine oil ................................................ 6-8
Engine, starting a warm .......................... 5-2
Engine stop switch.................................. 3-1FFront fork, checking .............................. 6-24
Fuel......................................................... 3-3
Fuel cock ................................................ 3-5
Fuel tank breather hose.......................... 3-4
Fuel tank cap .......................................... 3-3
Fuse, replacing ..................................... 6-27
HHandlebar switches ................................. 3-1IIdentification numbers ............................. 9-1KKey identification number ........................ 9-1
Kickstarter ............................................... 3-6LLabels, location of ...................................1-4MMain switch ............................................. 3-1
Maintenance and lubrication, periodic..... 6-4
Maintenance, emission control system ... 6-3
Maintenance, periodic ............................. 6-1
Matte color, caution .................................7-1
Model label .............................................. 9-2PPanels, removing and installing .............. 6-6
Parking ....................................................5-4
Part locations .......................................... 2-1
Pre-operation check list........................... 4-2SSafety information ...................................1-1
Seat ......................................................... 3-6
Shifting ....................................................5-2
Shift pedal ............................................... 3-2
Shift pedal, checking ............................. 6-19
Sidestand ................................................ 3-7
Sidestand, checking and lubricating...... 6-23
Spark arrester, cleaning ........................ 6-12
Spark plug, checking ...............................6-7
Specifications .......................................... 8-1
Starter (choke) lever................................ 3-6Starting and warming up a cold
engine ................................................... 5-1
Starting circuit cut-off system.................. 3-7
Start switch ............................................. 3-1
Steering, checking ................................ 6-25
Storage ................................................... 7-3
Supporting the motorcycle .................... 6-28
Swingarm pivots, lubricating ................. 6-24
TThrottle cable free play, checking ......... 6-14
Throttle grip and cable, checking and
lubricating ........................................... 6-22
Tires ...................................................... 6-15
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-31
Troubleshooting chart ........................... 6-32VValve clearance .................................... 6-14
Vehicle identification number .................. 9-1WWheel bearings, checking..................... 6-25
Wheel (front) ......................................... 6-28
Wheel (rear) .......................................... 6-30
Wheels .................................................. 6-16
U5B680E0.book Page 1 Tuesday, July 17, 2007 9:11 AM