
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
EAU00134
Lights switch
Turning the light switch to “ ”,
turns on the auxiliary light, meter lights
and taillight. Turning the light switch to
“ ” turns the headlight on also.
EAU00138
Engine stop switch
The engine stop switch is a safety de-
vice for use in an emergency such as
when the motorcycle overturns or if
trouble occurs in the throttle system.
Turn the switch to “ ” to start the en-
gine. In case of emergency, turn the
switch to “ ” to stop the engine.
EAU00141
Start switch “ ”
The starter motor cranks the engine
when pushing the start switch.
EC000005
CAUTION:@ See starting instructions prior to
starting the engine. @
EAU00153
Clutch leverThe clutch lever is located on the left
handlebar. It is equipped with a clutch
lever adjusting dial and a clutch switch,
which is integrated into the ignition cir-
cuit cut-off system. (Refer to the engine
starting procedures for a description of
this system.)
To disengage the clutch, pull the clutch
lever toward the handlebar. To engage
the clutch, release the lever. The lever
should be pulled rapidly and released
slowly for smooth clutch operation.
1. Engine stop switch
2. Lights switch
3. Start switch “ ”
1. Lever position adjusting dial
2. Arrow mark
a. Lever distance
E_4sv_Functions.fm Page 9 Tuesday, August 31, 1999 3:42 PM

PRE-OPERATION CHECKS
4-2
4
NOTE:Pre-operation checks should be made each time the motorcycle is used. Such an inspection can be thoroughly accom-
plished in a very short time; and the added safety it assures is more than worth the time involved.
WARNING
If any item in the PRE-OPERATION CHECK is not working properly, have it inspected and repaired before operating
the motorcycle.Sidestand pivot• Check for smooth operation.
• Lubricate if necessary.6-25
Chassis fasteners• Make sure that all nuts, bolts and screws are properly tightened.
• Tighten if necessary.—
Fuel• Check fuel level.
• Fill with fuel if necessary.3-11 ~ 3-12
Lights, signals and
switches• Check for proper operation. — ITEM CHECKS PAGE
E_4sv_Preop.fm Page 2 Tuesday, August 31, 1999 3:44 PM

OPERATION AND IMPORTANT RIDING POINTS
5-3
51. Turn the main switch to “ON” and
the engine stop switch to “ ”.
EC000035
CAUTION:@ If the fuel indicator light comes on,
check the fuel level. If necessary, fill
the tank with fuel. @2. Shift the transmission into neutral.NOTE:@ When the transmission is in neutral, the
neutral indicator light should be on. If
the light does not come on, ask a
Yamaha dealer to inspect it. @3. Turn on the starter (choke) and
completely close the throttle grip.
4. Start the engine by pushing the
start switch.
NOTE:@ If the engine fails to start, release the
start switch, wait a few seconds, then
try again. Each attempt should be as
short as possible to preserve the bat-
tery. Do not crank the engine more
than 10 seconds on any one attempt. @
EC000036
CAUTION:@ The oil level indicator light and fuel
indicator light should come on when
the start switch is pushed and
should go off when the start switch
is released. If the oil level indicator
light flickers or remains on, immedi-
ately stop the engine and check the
engine oil level and for oil leakage. If
necessary, fill the engine with oil
and check to see that the oil level in-
dicator light goes off. If not, consult
a Yamaha dealer. @
5. After starting the engine, move the
starter (choke) to the halfway posi-
tion.NOTE:@ For maximum engine life, never accel-
erate hard with a cold engine! @6. After the engine is warm, turn off
the starter (choke) completely.NOTE:@ The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off. @
E_4sv_Operation.fm Page 3 Tuesday, August 31, 1999 3:45 PM

OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU01258
Starting a warm engineThe starter (choke) is not required
when the engine is warm.
EC000046
CAUTION:@ See the “Engine break-in” section
prior to operating the motorcycle for
the first time. @
EAU00423
ShiftingThe transmission lets you control the
amount of power you have available at
a given speed for starting, accelerating,
climbing hills, etc. The use of the shift
pedal is shown in the illustration.
To shift into neutral, depress the shift
pedal repeatedly until it reaches the
end of its travel, then raise the pedal
slightly.
EC000048
CAUTION:@ l
Do not coast for long periods
with the engine off, and do not
tow the motorcycle a long dis-
tance. Even with gears in neu-
tral, the transmission is only
properly lubricated when the
engine is running. Inadequate
lubrication may damage the
transmission.
l
Always use the clutch when
changing gears. The engine,
transmission, and driveline are
not designed to withstand the
shock of forced shifting and can
be damaged by shifting without
using the clutch.
@
1. Shift pedal
N. Neutral
E_4sv_Operation.fm Page 4 Tuesday, August 31, 1999 3:45 PM

OPERATION AND IMPORTANT RIDING POINTS
5-5
5
EAU02941
Recommended shift points
(for Switzerland only)The recommended shift points are
shown in the table below.CF-25ENOTE:@ When shifting two gears down from 4th
to 2nd, bring your motorcycle to a
speed of 35 km/h. @
EAU00424
Tips for reducing fuel
consumptionYour motorcycle’s fuel consumption
depends to a large extent on your
riding style. The following tips can help
reduce fuel consumption:l
Warm up the engine before riding.
l
Turn off the starter (choke) as
soon as possible.
l
Shift up swiftly and avoid high en-
gine speeds during acceleration.
l
Do not double-clutch or rev the en-
gine while shifting down and avoid
high engine speeds with no load
on the engine.
l
Turn off the engine instead of let-
ting it idle for an extended length
of time, i.e. in traffic jams, at traffic
lights or railroad crossings.
EAU00436
Engine break-inThere is never a more important period
in the life of your motorcycle than the
period between zero and 1,000 km. For
this reason we ask that you carefully
read the following material. Because
the engine is brand new, you must not
put an excessive load on it for the first
1,000 km. The various parts in the en-
gine wear and polish themselves to the
correct operating clearances. During
this period, prolonged full throttle oper-
ation, or any condition which might re-
sult in excessive heating of the engine,
must be avoided.
Acceleration shift point
(km/h)
1st®2nd
2nd®3rd
3rd®4th
4th®5th23
36
50
60
E_4sv_Operation.fm Page 5 Tuesday, August 31, 1999 3:45 PM

6
PERIODIC MAINTENANCE AND MINOR REPAIR
Tool kit................................................................... 6-1
Periodic maintenance and lubrication ................... 6-2
Cowling removal and installation .......................... 6-5
Cowling A.............................................................. 6-5
Cowling B.............................................................. 6-5
Cowling C ............................................................. 6-6
Spark plugs........................................................... 6-7
Engine oil .............................................................. 6-9
Coolant ............................................................... 6-11
Air filter ............................................................... 6-12
Carburetor adjustment ........................................ 6-14
Idle speed adjustment ........................................ 6-15
Throttle cable free play inspection ...................... 6-15
Valve clearance adjustment ................................ 6-16
Tires .................................................................... 6-16
Wheels................................................................ 6-19
Brake light switch adjustment ............................. 6-19
Checking the front and rear brake pads.............. 6-20
Inspecting the brake fluid level............................ 6-21
Brake fluid replacement ...................................... 6-22
Drive chain slack check ...................................... 6-23Drive chain slack adjustment ............................. 6-23
Drive chain lubrication........................................ 6-24
Cable inspection and lubrication ........................ 6-24
Brake and shift pedal lubrication ........................ 6-24
Brake and clutch lever lubrication ...................... 6-25
Sidestand lubrication.......................................... 6-25
Rear suspension lubrication............................... 6-25
Front fork inspection ........................................... 6-26
Steering inspection ............................................ 6-26
Wheel bearings .................................................. 6-27
Battery................................................................ 6-27
Fuse replacement .............................................. 6-28
Headlight bulb replacement ............................... 6-29
Tail/brake light bulb replacement ........................ 6-30
Turn signal light bulb replacement...................... 6-30
Front wheel removal ........................................... 6-31
Front wheel installation ...................................... 6-31
Rear wheel removal ........................................... 6-32
Rear wheel installation ....................................... 6-33
Troubleshooting .................................................. 6-34
Troubleshooting chart......................................... 6-35
E_4sv_PeriodicTOC.fm Page 1 Tuesday, August 31, 1999 3:45 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6
EAU01668*
Spark plugsRemoval
1. Remove cowlings A and C. (See
pages 6-5 and 6-6 for removal and
installation procedures.)
2. Remove the spark plug caps.3. Use the spark plug wrench in the
tool kit to remove the spark plugs
as shown.
Inspection
The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate
the condition of the engine.
Normally, all spark plugs from the
same engine should have the same
color on the white insulator around the
center electrode. The ideal color at this
point is a medium-to-light tan color for a
motorcycle that is being ridden normal-
ly. If one spark plug shows a distinctlydifferent color, there could be some-
thing wrong with the engine.
Do not attempt to diagnose such prob-
lems yourself. Instead, take the motor-
cycle to a Yamaha dealer. You should
periodically remove and inspect the
spark plugs because heat and deposits
will cause any spark plug to slowly
break down and erode. If electrode ero-
sion becomes excessive, or if carbon
and other deposits are excessive, you
should replace the spark plug with the
specified plug.1. Spark plug cap (´ 4)
1. Spark plug wrench
Specified spark plug:
DR8EA (NGK)
X24ESR-U (DENSO)
E_4sv_Periodic.fm Page 7 Tuesday, August 31, 1999 3:45 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAU01765*
Engine oilOil level inspection
1. Place the motorcycle on a level
place and hold it in an upright posi-
tion. Warm up the engine for seve-
ral minutes.NOTE:@ Be sure the motorcycle is positioned
straight up when checking the oil level.
A slight tilt toward the side can result in
false readings. @
2. With the engine stopped, check
the oil level through the level win-
dow located at the lower part of
the right side crankcase cover.NOTE:@ Wait a few minutes until the oil level
settles before checking. @3. The oil level should be between
maximum and minimum marks. If
the level is low, fill the engine with
sufficient oil to reach the specified
level.Engine oil and oil filter cartridge re-
placement
1. Remove cowling A. (See page 6-5
for removal and installation proce-
dures.)
2. Warm up the engine for several
minutes.
3. Stop the engine. Place an oil pan
under the engine and remove the
oil filler cap.
4. Remove the drain bolt and drain
the oil.
1. Oil level window
2. Maximum level mark
3. Minimum level mark
1. Engine oil filler cap
1. Engine oil drain boltLeft side view
E_4sv_Periodic.fm Page 9 Tuesday, August 31, 1999 3:45 PM