
TABLE OF CONTENTS
LOCATION OF IMPORTANT
LABELS ............................................1-1
SAFETY INFORMATION .................. 2-1
DESCRIPTION .................................. 3-1
Left view .......................................... 3-1
Right view ........................................ 3-2
Controls and instruments ................3-3
INSTRUMENT AND CONTROL
FUNCTIONS ....................................... 4-1
Main switch ..................................... 4-1
Handlebar switches ........................ 4-1
Shift pedal ......................................4-2
Brake lever ..................................... 4-2
Brake pedal .................................... 4-3
Fuel tank cap .................................. 4-3
Fuel ................................................ 4-3
Fuel tank breather hose ................. 4-5
Fuel cock ........................................ 4-5
Starter (choke) lever ....................... 4-6
Kickstarter ......................................4-6
Seat ................................................ 4-7
Shock absorber assembly .............. 4-7
Sidestand ....................................... 4-8
Starting circuit cut-off system ......... 4-8 FOR YOUR SAFETY
–
PRE-OPERATION CHECKS ............. 5-1
OPERATION AND IMPORTANT
RIDING POINTS ................................ 6-1
Starting and warming up a cold engine ......................................... 6-1
Starting a warm engine .................. 6-2
Shifting ........................................... 6-2
Engine break-in .............................. 6-3
Parking ........................................... 6-4
PERIODIC MAINTENANCE AND
ADJUSTMENT ................................... 7-1
Owner ’s tool kit .............................. 7-2
Periodic maintenance chart for the emission control system ............. 7-3
General maintenance and lubrication chart .......................... 7-4
Removing and installing panels ..... 7-7
Checking the spark plug ................ 7-8
Engine oil ....................................... 7-9
Cleaning the air filter element ...... 7-11
Cleaning the spark arrester ......... 7-13
Adjusting the carburetor ............... 7-14
Adjusting the engine idling
speed ........................................ 7-14
Checking the throttle grip free play ........................................... 7-15
Valve clearance ........................... 7-15
Tires ............................................. 7-15 Spoke wheels ............................... 7-17
Adjusting the clutch free play ....... 7-17
Adjusting the brake lever free
play ........................................... 7-18
Adjusting the brake pedal free
play ........................................... 7-19
Checking the shift pedal ............... 7-19
Checking the front and rear brake shoes ........................................ 7-20
Drive chain slack .......................... 7-20
Cleaning and lubricating the drive chain ......................................... 7-22
Checking and lubricating the cables ....................................... 7-22
Checking and lubricating the throttle grip and cable ............... 7-23
Checking and lubricating the
brake lever ................................ 7-23
Checking and lubricating the brake pedal ............................... 7-23
Checking and lubricating the sidestand .................................. 7-24
Lubricating the swingarm pivots ... 7-24
Checking the front fork ................. 7-24
Checking the steering .................. 7-25
Checking the wheel bearings ....... 7-25
Battery .......................................... 7-26
Replacing the fuse ....................... 7-27
Supporting the motorcycle ........... 7-28
Front wheel .................................. 7-28
Rear wheel ................................... 7-30
U5B684E0.book Page 1 Monday, June 13, 2011 4:46 PM

LOCATION OF IMPORTANT LABELS
1-6
1Familiarize yourself with the following pictograms and read the explanatory text.
**.* kPa
*.** kgf/cm²
*.* psi **.* kPa
*.** kgf/cm²
*.* psi
Read the Owner ’s manual.
This unit contains high-pressure
nitrogen gas.
Mishandling can cause
an explosion. Do not incinerate,
puncture or open.
Turn off the main switch after
riding to avoid draining the
battery. Use unleaded gasoline only.
Measure the tire pressure when
the tires are cold.
Adjust the tire pressure.
Improper tire pressure can
cause loss of control.
Loss of control can result in
severe injury or death.
U5B684E0.book Page 6 Monday, June 13, 2011 4:46 PM

DESCRIPTION
3-1
3
EAU10410
Left view
678
123 4
5
1. Fuel cock (page 4-5)
2. Starter (choke) lever (page 4-6)
3. Fuse (page 7-27)
4. Battery (page 7-26)
5. Clutch adjusting screw (page 7-17)
6. Engine oil drain bolt (page 7-9)
7. Shift pedal (page 4-2)
8. Throttle stop screw (page 7-14)U5B684E0.book Page 1 Monday, June 13, 2011 4:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-26
7
EAU23396
Battery The battery is located behind panel B.
(See page 7-7.)
This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery coupler needs to be
checked and, if necessary, securely
fastened.
WARNING
EWA10760
Electrolyte is poisonous and
dangerous since it contains sul-
furic acid, which causes severeburns. Avoid any contact with
skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID.
EXTERNAL: Flush with plenty
of water.
INTERNAL: Drink large quan-
tities of water or milk and im-
mediately call a physician.
EYES: Flush with water for 15
minutes and seek prompt
medical attention.
Batteries produce explosive hy-
drogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.
KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the battery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
NOTICE
ECA16521
To charge a VRLA (Valve Regulated
Lead Acid) battery, a special (con-
stant-voltage) battery charger is re-
quired. Using a conventional battery
charger will damage the battery.To store the battery
1. If the model will not be used for more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
NOTICE: When removing the
battery, be sure the key is
turned to “OFF ” before discon-
necting the coupler.
[ECA16322]
2. If the battery will be stored for more than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in- stallation. NOTICE: When install-
ing the battery, be sure the key
is turned to “ OFF” before con-
necting the coupler.
[ECA16930]
1. Battery coupler
2. Battery band
3. Battery
2 3
1
U5B684E0.book Page 26 Monday, June 13, 2011 4:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
7
NOTICE
ECA16530
Always keep the battery charged.
Storing a discharged battery can
cause permanent battery damage.
EAU50430
Replacing the fuse The fuse is located inside the battery
coupler. (See page 7-26.)
If the fuse is blown, replace it as fol-
lows.1. Turn the key to “ OFF” and turn off
all electrical circuits.
2. Disconnect the battery coupler.
3. Remove the blown fuse, and then install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15131]
4. Connect the battery coupler.
5. Turn the key to “
ON”.
6. If the fuse immediately blows again, have a Yamaha dealer
check the electrical system.
1. Battery coupler
2. Fuse
3. Spare fuse
1 3
2
Specified fuse: 10.0 A
U5B684E0.book Page 27 Monday, June 13, 2011 4:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-33
7
EAU25903
Troubleshooting chart
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 have a Yamaha dealer charge
the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U5B684E0.book Page 33 Monday, June 13, 2011 4:46 PM

MOTORCYCLE CARE AND STORAGE
8-4
82. For motorcycles equipped with a
fuel cock that has an “OFF ” posi-
tion: Turn the fuel cock lever to
“ OFF ”.
3. Drain the carburetor float chamber by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
5. 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.) WARNING! To prevent dam-
age or injury from sparking,
make sure to ground the
spark plug electrodes while
turning the engine over.
[EWA10951]
e. Remove the spark plug cap from the spark plug, and then
install the spark plug and the
spark plug cap.
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
7-26.
TIPMake any necessary repairs before
storing the motorcycle.
U5B684E0.book Page 4 Monday, June 13, 2011 4:46 PM

SPECIFICATIONS
9-2
9
Transmission type:Constant mesh 4-speed
Operation: Left foot operation
Gear ratio:
1st: 3.166 (38/12)
2nd:
1.941 (33/17)
3rd: 1.380 (29/21)
4th: 1.095 (23/21)Chassis:Frame type:Backbone
Caster angle: 26.00 °
Trail:
60 mm (2.4 in)Front tire:Type:With tube
Size:
2.50-14 4PR
Manufacturer/model: CHEN SHIN/C-803-2Rear tire:Type:
With tube
Size: 3.00-12 4PR
Manufacturer/model: CHEN SHIN/C-803-2
Loading:Maximum rider weight:60.0 kg (132 lb)Tire air pressure (measured on cold
tires):
Front: 100 kPa (1.00 kgf/cm ², 15 psi)
Rear:
100 kPa (1.00 kgf/cm ², 15 psi)
Front wheel:Wheel type:
Spoke wheel
Rim size:
14x1.40Rear wheel:Wheel type:Spoke wheel
Rim size:
12x1.60Front brake:Type:Drum brake
Operation:
Right hand operationRear brake:Type:Drum brake
Operation:
Right foot operationFront suspension:Type:Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper Wheel travel:
115.0 mm (4.53 in)
Rear suspension:Type:
Swingarm
Spring/shock absorber type: Coil spring/gas-oil damper
Wheel travel: 110.0 mm (4.33 in)Electrical system:Ignition system:DC CDI
Charging system: AC magnetoBattery:Model:GT4B-5
Voltage, capacity: 12 V, 2.5 AhFuse:Fuse:10.0 A
U5B684E0.book Page 2 Monday, June 13, 2011 4:46 PM