Page 9 of 76

TABLE OF CONTENTS
SAFETY INFORMATION .................. 1-1
DESCRIPTION .................................. 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments ................2-3
INSTRUMENT AND CONTROL
FUNCTIONS....................................... 3-1
Main switch ..................................... 3-1
Handlebar switches ........................ 3-1
Shift pedal ......................................3-2
Brake lever ..................................... 3-2
Brake pedal .................................... 3-3
Fuel tank cap .................................. 3-3
Fuel ................................................ 3-3
Fuel tank breather hose ................. 3-5
Fuel cock ........................................ 3-5
Starter (choke) lever ....................... 3-6
Kickstarter ......................................3-7
Seat ................................................ 3-7
Shock absorber assembly .............. 3-8
Sidestand ....................................... 3-8
Starting circuit cut-off system ......... 3-8
FOR YOUR SAFETY –
PRE-OPERATION CHECKS.............. 4-1
Pre-operation check list .................. 4-2OPERATION AND IMPORTANT
RIDING POINTS................................ 5-1
Starting and warming up a cold
engine ......................................... 5-1
Starting a warm engine .................. 5-2
Shifting ........................................... 5-2
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 6-1
Owner’s tool kit .............................. 6-2
Periodic maintenance chart for
the emission control system ....... 6-3
General maintenance and
lubrication chart .......................... 6-4
Removing and installing panels ..... 6-6
Checking the spark plug ................ 6-7
Engine oil ....................................... 6-8
Cleaning the air filter element ...... 6-10
Cleaning the spark arrester ......... 6-12
Adjusting the carburetor ............... 6-13
Adjusting the engine idling
speed ........................................ 6-13
Checking the throttle cable free
play ........................................... 6-14
Valve clearance ........................... 6-14
Tires ............................................. 6-15
Spoke wheels .............................. 6-16
Adjusting the clutch free play ....... 6-16Adjusting the brake lever free
play ........................................... 6-17
Adjusting the brake pedal free
play ........................................... 6-18
Checking the shift pedal ............... 6-19
Checking the front and rear brake
shoes ........................................ 6-19
Drive chain slack .......................... 6-20
Cleaning and lubricating the drive
chain ......................................... 6-21
Checking and lubricating the
cables ....................................... 6-22
Checking and lubricating the
throttle grip and cable ............... 6-22
Checking and lubricating the
brake lever ................................ 6-23
Checking and lubricating the
brake pedal ............................... 6-23
Checking and lubricating the
sidestand .................................. 6-23
Lubricating the swingarm pivots ... 6-24
Checking the front fork ................. 6-24
Checking the steering .................. 6-25
Checking the wheel bearings ....... 6-25
Battery .......................................... 6-25
Replacing the fuse ....................... 6-27
Supporting the motorcycle ........... 6-27
Front wheel .................................. 6-28
Rear wheel ................................... 6-29
Troubleshooting ........................... 6-31
Troubleshooting chart .................. 6-32
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
6
EAU18771
Removing and installing pan-
els The panels shown need to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
this section each time a panel needs to
be removed and installed.
EAU41110
Panel A
To remove the panel1. Remove the seat. (See page 3-7.)
2. Remove the bolts and the quick
fastener screws, and then take the
panel off.To install the panel
1. Place the panel in the original posi-
tion, and then install the bolts and
the quick fastener screws.
2. Install the seat.
EAU33020
Panel B
To remove the panel1. Remove the seat. (See page 3-7.)
2. Remove the bolt, and then pull the
panel off as shown.
1. Panel A
1
1. Panel B
1
1. Panel A
2. Bolt
3. Quick fastener screw
3
1 2
3
U5B681E0.book Page 6 Tuesday, June 17, 2008 5:48 PM
Page 40 of 76

PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6To install the panel
1. Place the panel in the original posi-
tion, and then install the bolt.
2. Install the seat.
EAU19603
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
TIPIf the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer checkthe vehicle.
1. Panel B
2. Bolt
3. Projection
3
1
2
1. Spark plug cap
1
1. Spark plug wrench
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
66. Apply oil of the recommended type
to the entire surface of the sponge
material, and then squeeze the ex-
cess oil out.
TIPThe sponge material should be wet butnot dripping.
7. Insert the mesh and the sponge
material into the air filter case.
NOTICE: Make sure that the
mesh and the sponge material
are properly seated in the air fil-
ter case. The engine should
never be operated without themesh and the sponge material
installed, otherwise the pis-
ton(s) and/or cylinder(s) may
become excessively worn.
[ECA15572]
8. Install the air filter case cover by in-
stalling the screws.TIPMake sure that the spark plug cable isrouted as shown.9. Install the panel.
To clean the air filter check hose
1. Check the hoses at the bottom of
the air filter case for accumulated
dirt or water.
Recommended oil:
Yamaha foam air filter oil or other
quality foam air filter oil
1. Spark plug cable
1. Air filter check hose
1 1
1
U5B681E0.book Page 11 Tuesday, June 17, 2008 5:48 PM