Page 15 of 84

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10460
Main switch/steering lock The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
EAU37441
ON
All electrical circuits are supplied with
power, and the engine can be started.
The key cannot be removed.NOTE:The headlight, auxiliary lights, meter
lighting and taillight come on automati-cally when the engine is started.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU10700
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.
To lock the steering1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF” po-
sition, release it, and then turn it to
“LOCK”.3. Remove the key.
To unlock the steering
Insert the key and turn it to “OFF”.
WARNING
EWA10060
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving,
otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident. Make
sure that the vehicle is stopped be-
fore turning the key to “OFF” or“LOCK”.
1. Push.
2. Release.
3. Turn.
123
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Page 68 of 84

PERIODIC MAINTENANCE AND MINOR REPAIR
6-35
67. Take the motorcycle off the center-
stand so that the rear wheel is on
the ground.
8. Tighten the brake torque rod nut
and axle nut to the specified
torques.
NOTE:When tightening the axle nut, hold the
wheel axle with a wrench to keep it fromturning.
9. Insert a new cotter pin.
10. Adjust the brake pedal free play.
(See page 6-19.)
WARNING
EWA10660
After adjusting the brake pedal free
play, check the operation of thebrake light.
EAU25870
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
Tightening torques:
Brake torque rod nut:
19 Nm (1.9 m·kgf, 14 ft·lbf)
Axle nut:
60 Nm (6.0 m·kgf, 43 ft·lbf)
U5YPE0E0.book Page 35 Wednesday, February 23, 2005 4:22 PM
Page 69 of 84

PERIODIC MAINTENANCE AND MINOR REPAIR
6-36
6
EAU37620
Troubleshooting charts Starting problems or poor engine performance
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 or the
kickstarter.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
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. Have a
Yamaha dealer check the vehicle.The engine does not start.
Check the battery.Open the throttle halfway and
operate the electric starter.
Operate the
electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the electrolyte and battery
lead connections, and charge the
battery if necessary.
U5YPE0E0.book Page 36 Wednesday, February 23, 2005 4:22 PM
Page 76 of 84

SPECIFICATIONS
8-2
8
Caster angle:25.50 °
Trail: 75.0 mm (2.95 in)Front tire:Type:
With tube
Size: 70/90-17M/C 38P
Manufacturer/model:
IRC/NF63B
Manufacturer/model: DUNLOP/D 102FARear tire:Type:
With tube
Size: 80/90-17M/C 44P
Manufacturer/model: IRC/NR78Y
Manufacturer/model:
DUNLOP/D102ALoading:Maximum load:110 kg (243 lb)
(Total weight of rider, passenger, cargo and
accessories)Tire air pressure (measured on cold
tires):Loading condition:
0–90 kg (0 –198 lb)
Front: 200 kPa (29 psi) (2.00 kgf/cm ²) Rear:
225 kPa (33 psi) (2.25 kgf/cm ²)
Loading condition: 90–110 kg (198 –243 lb)
Front:
200 kPa (29 psi) (2.00 kgf/cm ²)
Rear: 225 kPa (33 psi) (2.25 kgf/cm ²)
Front wheel:Wheel type:
Spoke wheel
Rim size: 17x1.20Rear wheel:Wheel type:
Spoke wheel
Rim size: 17x1.60Front brake:Type:
Single disc brake
Operation: Right hand operation
Recommended fluid: DOT 3 or 4Rear brake:Type:Drum brake
Operation: Right foot operationFront suspension:Type:Telescopic fork Spring/shock absorber type:
Coil spring/oil damper
Wheel travel: 100.0 mm (3.94 in)
Rear suspension:Type:Swingarm (monocross)
Spring/shock absorber type: Coil spring/oil damper
Wheel travel:
90.0 mm (3.54 in)Electrical system:Ignition system:DC. CDI
Charging system:
AC magnetoBattery:Model:GM5Z-3B/YB 5L-B
Voltage, capacity:
12 V, 5.0 AhHeadlight:Bulb type:Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 32 W/32.0 W × 1
Tail/brake light: 12 V, 5.0 W/21.0 W × 1
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light: 12 V, 10.0 W × 2
U5YPE0E0.book Page 2 Wednesday, February 23, 2005 4:22 PM