Page 15 of 91

3-1
3
EAU00027
3-INSTRUMENT AND CONTROL FUNCTIONS
EAU00028
Main switchThe main switch controls the ignition
and lighting systems. Its operation is
described below.
EAU00036
ON
Electrical circuits are switched on. The
engine can be started. The key cannot
be removed in this position.
EAU00038
OFF
All electrical circuits are switched off.
The key can be removed in this posi-
tion.
EAU00054*
(Parking)
The taillight and auxiliary light come on
but all other circuits are off. With the
key at “OFF”, push it into the main
switch, turn it counterclockwise to “ ”,
and remove it. To cancel the parking,
turn the key clockwise.
EAU00056
Indicator lights
EAU00063
1. High beam indicator light “ ”
This indicator comes on when the
headlight high beam is used.
EAU00079
2. Fuel level indicator light “ ”
When the fuel level drops below ap-
proximately 3.5 L, this light will come
on. When this light comes on, switch
the fuel cock to “RES”. Then, fill the
tank at the first opportunity.
EAU00061
3. Neutral indicator light “ ”
This indicator comes on when the
transmission is in neutral.
E_4YP_Functions.fm Page 1 Wednesday, October 6, 1999 10:03 AM
Page 21 of 91

INSTRUMENT AND CONTROL FUNCTIONS
3-7
3
EAU02917
Fuel tank capTo remove
Slide the lock cover open, insert the
key and turn it 1/4 turn clockwise. The
lock will be released and the cap can
be removed.
To install
Make sure the arrow mark on the tank
cap is facing forward, then push the
tank cap into position. Turn the key
counterclockwise to the original posi-
tion and remove it. Close the lock cov-
er.
NOTE:@ This tank cap cannot be closed unless
the key is in the lock. The key cannot
be removed if the cap is not locked
properly. @
EW000023
WARNING
@ Be sure the cap is properly installed
and locked in place before riding the
motorcycle. @
EAU01183
FuelMake sure there is sufficient fuel in the
tank. Fill the fuel tank to the bottom of
the filler tube as shown in the illustra-
tion.
EW000130
WARNING
@ Do not overfill the fuel tank. Avoid
spilling fuel on the hot engine. Do
not fill the fuel tank above the bot-
tom of the filler tube or it may over-
flow when the fuel heats up later and
expands. @1. Filler tube
2. Fuel level
E_4YP_Functions.fm Page 7 Wednesday, October 6, 1999 10:03 AM
Page 23 of 91

INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
RES
This indicates reserve. If you run out of
fuel while riding, set the fuel cock to this
position. Fill the tank at the first oppor-
tunity. Be sure to set the fuel cock back
to “ON” after refueling!
EAU03032
Starter (choke) knobStarting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the knob in direction
a to turn on
the starter (choke).
Move the knob in direction
b to turn off
the starter (choke).
EAU01214
Steering lockThe steering lock is located on the left
side of the head pipe.
To lock the steering
1. Turn the handlebars all the way to
the right.
2. Open the steering lock cover.
3. Insert the key and turn it counter-
clockwise 1/8 turn.
4. Push the key in and turn it back
1/8 turn clockwise.
5. Check that the steering is locked.
6. Remove the key and close the
steering lock cover.
1. Pointed end positioned over “RES”RES: reserve position
1. Steering lock
E_4YP_Functions.fm Page 9 Wednesday, October 6, 1999 10:03 AM
Page 24 of 91
INSTRUMENT AND CONTROL FUNCTIONS
3-10
3 To unlock the steering
1. Open the steering lock cover.
2. Insert the key, turn it counterclock-
wise 1/8 turn, and let go of it. (It au-
tomatically moves to where it can
be removed.)
3. Remove the key and close the
steering lock cover.
On the right side of the headpipe, there
is also a place to lock the steering with
a padlock. Turn the handlebars to align
the holes in the two brackets and lock
the steering with a suitable padlock.
EAU01604
Rider seatThe rider seat lock is located behind
the rider seat on the left side.
To open the seat, insert the key in the
seat lock and turn it counterclockwise.
Then, remove the seat.
To reinstall the seat, insert the projec-
tion on the front of the seat into the seat
holder on the frame, then push down
on the rear of the seat. Turn the key to
the center position and remove it.NOTE:@ Make sure that the seat is securely fit-
ted. @
E_4YP_Functions.fm Page 10 Wednesday, October 6, 1999 10:03 AM
Page 69 of 91

PERIODIC MAINTENANCE AND MINOR REPAIR
6-27
6
EAU00833
Headlight bulb replacementThis motorcycle is equipped with a
quartz bulb headlight.
If the headlight bulb burns out, replace
the bulb as follows:
1. Remove the headlight unit screws.2. Remove the connectors, the head-
light unit and then the bulb cover.
3. Turn the bulb holder counterclock-
wise to remove it and remove the
defective bulb.
EW000119
WARNING
@ Keep flammable products and your
hands away from a bulb while it is
on, as it is hot. Do not touch a bulb
until it cools down. @4. Put a new bulb into position and
secure it in place with the bulb
holder.
EC000105
CAUTION:@ Avoid touching the glass part of a
bulb. Keep it free from oil; other-
wise, the transparency of the glass,
life of the bulb, and luminous flux
will be adversely affected. If oil gets
on a bulb, thoroughly clean it with a
cloth moistened with alcohol or lac-
quer thinner. @5. Install the bulb cover, connectors
and headlight unit. Ask a Yamaha
dealer to adjust the headlight
beam if necessary.
1. Screw (´ 2)
1. Connector (´ 3)
E_4YP_Periodic.fm Page 27 Wednesday, October 6, 1999 10:05 AM
Page 70 of 91

PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
6
EAU00855
Turn signal and taillight bulb
replacement1. Remove the screws and the lens.
2. Push the bulb inward and turn it
counterclockwise.
3. Place a new bulb in the socket.
Push the bulb inward and turn it
clockwise until it engages into the
socket.
4. Install the lens and the screws.
EC000108
CAUTION:@ Do not over-tighten the screws as
the lens may break. @
EAU01008
TroubleshootingAlthough Yamaha motorcycles receive
a rigid inspection before shipment from
the factory, trouble may occur during
operation.
Any problem in the fuel, compression,
or ignition systems can cause poor
starting and loss of power. The trouble-
shooting chart describes a quick, easy
procedure for making checks.
If your motorcycle requires any repair,
bring it to a Yamaha dealer. The skilled
technicians at a Yamaha dealership
have the tools, experience, and know-
how to properly service your motor-
cycle. Use only genuine Yamaha parts
on your motorcycle. Imitation parts may
look like Yamaha parts, but they are of-
ten inferior. Consequently, they have a
shorter service life and can lead to ex-
pensive repair bills.
1. Screw (´ 2)
1. Screw (´ 3)
E_4YP_Periodic.fm Page 28 Wednesday, October 6, 1999 10:05 AM
Page 72 of 91

PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
5. Engine overheating
EW000070
WARNING
@ Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be blown
out under pressure, which could cause serious injury. Open the radiator cap as follows. Wait until the engine has
cooled. Remove the radiator cap stopper by removing the screw. Place a thick rag like a towel over the radiator cap
and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape.
When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. @NOTE:@ If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recom-
mended coolant as soon as possible. @
Wait until the
engine has cooled.
Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.Level is low, check the
cooling system for leakage.
No
leakage.Leakage.
Ask a Yamaha dealer to inspect
and repair the cooling system.Add coolant. (See NOTE.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and repair the cooling system.
E_4YP_Periodic.fm Page 30 Wednesday, October 6, 1999 10:05 AM