2002 YAMAHA DT125R ignition

EAU00009
TABLE OF CONTENTS
GIVE SAFETY THE RIGHT OF WAY ............... 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
Indicator and warning lights ............................ 3-1
Speedometer unit .......................................... 3-2
Tachometer .................................................... 3-2
Coolant temperature gauge ............................ 3-3
Handlebar switches ........................................ 3-3
Clutch lever .................................................... 3-4
Shift pedal ...................................................... 3-4
Brake lever ..................................................... 3-5
Brake pedal .................................................... 3-5
Fuel tank cap .................................................. 3-5
Fuel (except for Switzerland and Austria) ...... 3-6
Fuel (for Switzerland and Austria) ................. 3-6
Catalytic converter
(for Switzerland and Austria) ....................... 3-7
2-stroke engine oil .......................................... 3-8
Fuel cock ........................................................ 3-9
Starter (choke) lever ..................................... 3-10Kickstarter .................................................... 3-10
Steering lock ................................................. 3-10
Seat .............................................................. 3-11
Helmet holder ............................................... 3-12
Adjusting the shock absorber assembly ....... 3-12
Carrier .......................................................... 3-14
YEIS handling precautions .......................... 3-14
YPVS ............................................................ 3-14
Sidestand ..................................................... 3-15
Ignition circuit cut-off system ........................ 3-16
PRE-OPERATION CHECKS ............................. 4-1
Pre-operation check list .................................. 4-1
OPERATION AND IMPORTANT
RIDING POINTS ............................................... 5-1
Starting a cold engine .................................... 5-1
Starting a warm engine .................................. 5-2
Shifting ........................................................... 5-2
Recommended shift points
(for Switzerland only) .................................. 5-3
Tips for reducing fuel consumption ................ 5-3
Engine break-in .............................................. 5-4
Parking ........................................................... 5-5
123
45
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3-1
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INSTRUMENT AND CONTROL FUNCTIONS
3
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Main switchThe main switch controls the ignition
and lighting systems. The various
main switch positions are described
below.
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ON
All electrical systems are supplied
with power, and the engine can be
started. The key cannot be removed.
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OFF
All electrical systems are off. The key
can be removed.
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Neutral indicator light “N”
This indicator light comes on when
the transmission is in the neutral
position.
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2-stroke engine oil level warning
light “
7
”
This warning light comes on when
the 2-stroke engine oil level is low.
The electrical circuit of the warning
light can be checked according to the
following procedure.
1. Turn the key to “ON”.
2. Shift the transmission into the
neutral position.
3. If the warning light does not
come on, have a Yamaha dealer
check the electrical circuit.
NOTE:
Even if the 2-stroke engine oil level is
sufficient, the warning light may flick-
er when riding on a slope or during
sudden acceleration or deceleration,
but this is not a malfunction.
ON
OFF
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Indicator and warning lights
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Turn signal indicator light “5”
This indicator light flashes when the
turn signal switch is pushed to the left
or right.
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High beam indicator light “&”
This indicator light comes on when
the high beam of the headlight is
switched on.
1
2
3
4
1. Turn signal indicator light “5”
2. High beam indicator light “&”
3. Neutral indicator light “N”
4. 2-stroke engine oil level warning
light “
7
”
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3-15
INSTRUMENT AND CONTROL FUNCTIONS
3
EC000023
cCThe YPVS has been set and exten-
sively tested at the Yamaha facto-
ry. Changing these settings with-
out sufficient technical knowledge
may result in poor performance of
or damage to the engine.YPVS operation noises can be heard
in the following instances:
8When the key is turned to “ON”
and the engine is started.
8When the engine stalls with the
key in the “ON” position.
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cCIf the YPVS does not operate, have
a Yamaha dealer check it.
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SidestandThe sidestand is located on the left
side of the frame. Raise the side-
stand or lower it with your foot while
holding the motorcycle upright.NOTE:
The built-in sidestand switch is part of
the ignition circuit cut-off system,
which cuts the ignition in certain situ-
ations. (See further down for an
explanation of the ignition circuit cut-
off system.)
EW000044
wThe motorcycle must not be ridden
with the sidestand down, or if the
sidestand cannot be properly
moved up (or does not stay up),
otherwise the sidestand could con-
tact the ground and distract the
operator, resulting in a possible
loss of control. Yamaha’s ignition
circuit cut-off system has been
designed to assist the operator in
fulfilling the responsibility of rais-
ing the sidestand before starting
off. Therefore, check this system
regularly as described below and
have a Yamaha dealer repair it if it
does not function properly.
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3-16
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Ignition circuit cut-off
systemThe ignition circuit cut-off system
(comprising the sidestand switch and
neutral switch) has the following func-
tions.
8It prevents starting when the
transmission is in gear and the
sidestand is still down.
8It cuts the running engine when
the transmission is in gear and
the sidestand is moved down.
Periodically check the operation of
the ignition circuit cut-off system
according to the following procedure.
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wIf a malfunction is noted, have a
Yamaha dealer check the system
before riding.INSTRUMENT AND CONTROL FUNCTIONS
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4-3
PRE-OPERATION CHECKS
4
NOTE:
Pre-operation checks should be made each time the motorcycle is used. Such an inspection can be accomplished in a
very short time; and the added safety it assures is more than worth the time involved.
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wIf any item in the Pre-operation check list is not working properly, have it inspected and repaired before operat-
ing the motorcycle.Instruments, lights, signals
and switches•Check operation.
•Correct if necessary.3-1–3-4, 6-36–6-38
Sidestand switch•Check operation of ignition circuit cut-off system.
•If system is defective, have Yamaha dealer check vehicle.3-15–3-17
Battery•Check fluid level.
•Fill with distilled water if necessary.6-33–6-35 ITEM CHECKS PAGE
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5-1
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OPERATION AND IMPORTANT RIDING POINTS
5
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w8Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer
regarding any control or func-
tion that you do not thorough-
ly understand.
8Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.
8Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible loss
of control.
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Starting a cold engineIn order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:
8The transmission is in the neutral
position.
8The transmission is in gear with
the clutch lever pulled and the
sidestand up.
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w8Before starting the engine,
check the function of the igni-
tion circuit cut-off system
according to the procedure
described on page 3-17.
8Never ride with the sidestand
down.
1. Turn the fuel cock lever to “ON”.
2. Turn the key to “ON” and make
sure that the engine stop switch
is set to “#”.
3. Shift the transmission into the
neutral position.NOTE:
When the transmission is in the neu-
tral position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical
circuit.
ON
FUEL
RES
OFF
1
ON
1. Arrow mark positioned over “ON”
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6-43
PERIODIC MAINTENANCE AND MINOR REPAIR
6
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TroubleshootingAlthough Yamaha motorcycles
receive a thorough inspection before
shipment from the factory, trouble
may occur during 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 motorcy-
cle require any repair, take it to a
Yamaha dealer, whose skilled techni-
cians 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
inferior, have a shorter service life
and can lead to expensive repair
bills.
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To install the rear wheel
1. Install the drive chain onto the
rear sprocket, and then insert the
wheel axle from the left side.NOTE:
Make sure that there is enough
space between the brake pads
before inserting the brake disc
between the pads.2. Install the swingarm end bolts,
and then lower the rear wheel so
that it is on the ground.
3. Adjust the drive chain slack.
(See page 6-27 for drive chain
slack adjustment procedures.)
4. Tighten the axle nut and
swingarm end bolts to the speci-
fied torques.
Tightening torques:
Axle nut:
90 Nm (9.0 m0kgf)
Swingarm end bolts:
3 Nm (0.3 m0kgf)
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6-44
PERIODIC MAINTENANCE AND MINOR REPAIR
6
Check if there is fuel1. Fuel
Enough fuel.
No fuel.
Go to compression check.
Supply fuel.
Engine doesn’t start, go to compression check.
Use kickstarter.2. Compression
There is compression.
No compression.
Go to ignition check.
Ask a Yamaha dealer to
Remove spark plug3. Ignition
Wet.
Dry.
Wipe clean with dry cloth and correct
Ask a Yamaha dealer to inspect.
Engine doesn’t start, ask a YamahaOpen throttle half-way and start
in the fuel tank.
and check electrodes.spark gap or replace spark plug. the engine.
dealer to inspect. inspect.
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Troubleshooting charts
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wKeep away open flames and do not smoke while checking or working on the fuel system.
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