2000 YAMAHA DT125R check engine
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EAU00009
TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9 GIVE SAFETY THE RIGHT OF WAY..................1-1
DESCRIPTION....................................................2-1
Left view............................................................2-1
Right view.........................................................2-2
Controls/Instruments.........................................2-3
INSTRUMENT AND CONTROL FUNCTIONS....3-1
Main switch.......................................................3-1
Indicator lights...................................................3-1
Oil level indicator circuit check..........................3-2
Speedometer....................................................3-3
Tachometer.......................................................3-3
Engine temperature gauge...............................3-4
Handlebar switches..........................................3-4
Clutch lever.......................................................3-5
Shift pedal.........................................................3-5
Front brake lever...............................................3-6
Rear brake pedal..............................................3-6
Fuel tank cap....................................................3-6
Fuel (except for Switzerland and Austria).........3-7
Fuel (for Switzerland and Austria)....................3-7
Catalyzer (for Switzerland and Austria)............3-8
Two-stroke engine oil........................................3-9
Fuel cock..........................................................3-9
Starter (choke) Ò
1Ó.........................................3-10Kick starter......................................................3-11
Steering lock...................................................3-11
Seat................................................................3-12
Helmet holder.................................................3-12
Rear shock absorber adjustment....................3-13
Rear carrier.....................................................3-14
Note on handling of the Yamaha Energy
Induction System (Y.E.I.S.).............................3-14
Y.P.V.S.
(Yamaha Power Valve System)......................3-15
Sidestand........................................................3-15
Sidestand switch operation check..................3-16
PRE-OPERATION CHECKS...............................4-1
Pre-operation check list....................................4-1
OPERATION AND IMPORTANT RIDING
POINTS................................................................5-1
Starting the engine............................................5-1
Starting a warm engine.....................................5-3
Shifting..............................................................5-4
Recommended shift points
(for Switzerland only)........................................5-4
Tips for reducing fuel consumption...................5-5
Engine break-in.................................................5-5
Parking..............................................................5-6
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3-1
ON
OFF
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Main switchThe main switch controls the ignition
and lighting systems. Its operation is
described below.
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ON
Electrical circuits are switched on.
The engine can be started. The key
cannot be removed in this position.
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OFF
All electrical circuits are switched off.
The key can be removed in this posi-
tion.EAU00027
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
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High beam indicator light Ò
&Ó
This indicator comes on when the
headlight high beam is used.
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Oil level indicator light Ò
7
Ó
This indicator comes on when the oil
level is low. This light circuit can be
checked by the procedure on page 3-
2.EC000000
cCDo not run the motorcycle until
you know it has sufficient engine
oil.NOTE
Even if the oil is filled to the specified
level, the indicator light may flicker
when riding on a slope or during sud-
den acceleration or deceleration, but
this is normal.
1
2
3
4
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Indicator lights
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Turn indicator light Ò5Ó
This indicator flashes when the turn
switch is moved to the left or right.
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Neutral indicator light ÒNÓ
This indicator comes on when the
transmission is in neutral.1.Turn indicator light Ò5Ó
2.High beam indicator light Ò&Ó
3.Neutral indicator light ÒNÓ
4.Oil level indicator light Ò
7
Ó
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Oil level indicator circuit check
3-2
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9Turn the main switch to ÒONÓ.
Put the transmission in neutral.
Oil level indicator light
does not come on.Ask a Yamaha dealer to
inspect electrical circuit.
Oil level indicator light
comes on.
Oil level indicator light
does not come on.
Supply engine oil.
Shift into gear.
Engine oil level and
electrical circuit are OK.
Go ahead with riding.
Oil level indicator light
comes on.
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3-11
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
1
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Kick starterRotate the kick starter away from the
engine. Push the starter down lightly
with your foot until the gears engage,
then kick smoothly and forcefully to
start the engine. This model has a
primary-coupled kick starter so the
engine can be started in any gear if
the clutch is disengaged. However,
shifting to neutral before starting is
recommended.1.Kick starter
EAU02934
Steering lockTo lock the steering
Turn the handlebars all the way to
the right and open the steering lock
cover.
Insert the key and turn it 1/8 turn
counterclockwise. Then, push the key
in while turning the handlebars slight-
ly to the left and turn the key 1/8 turn
clockwise.
Check that the steering is locked,
remove the key and close the lock
cover.
1
1.Steering lock
To unlock the steering
Insert the key, push it in and turn it
1/8 turn counterclockwise so that it
moves out. Then, release and
remove the key.
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EW000045
wIf improper operation is noted,
consult a Yamaha dealer immedi-
ately.
3-16
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
ENGINE WILL STALL.SIDESTAND SWITCH IS OK.
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Sidestand switch operation
checkCheck the operation of the sidestand
switch against the information below.TURN THE MAIN SWITCH TO ÒONÓ AND
THE ENGINE STOP SWITCH TO Ò#Ó.TRANSMISSION IS IN NEUTRAL AND
SIDESTAND IS DOWN.PULL IN THE CLUTCH LEVER AND
PUT TRANSMISSION IN GEAR.ENGINE WILL START.KICK THE KICK STARTER.
EW000044
wThis motorcycle must not be oper-
ated with the sidestand in the
down position. If the stand is not
properly retracted, it could contact
the ground and distract the opera-
tor, resulting in a possible loss of
control. Yamaha has designed into
this motorcycle a lockout system
to assist the operator in fulfilling
the responsibility of retracting the
sidestand. Please check carefully
the operating instructions listed
below and if there is any indication
of a malfunction, return the motor-
cycle to a Yamaha dealer immedi-
ately for repair.
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4-1
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PRE-OPERATION CHECKS
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2
34
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7
8
9 Owners are personally responsible for their vehicleÕs condition. Your motorcycleÕs vital functions can start to deteriorate
quickly and unexpectedly, even if it remains unused (for instance, if it is exposed to the elements). Any damage, fluid
leak or loss of tire pressure could have serious consequences. Therefore, it is very important that, in addition to a thor-
ough visual inspection, you check the following points before each ride.
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PRE-OPERATION CHECK LIST
ITEMCHECKSPAGE
Front brake9Check operation, free play, fluid level and vehicle for fluid leakage.
9Fill with DOT 4 (or DOT 3) brake fluid if necessary.
3-6, 6-21 ~ 6-25
Rear brake9Check operation, free play, fluid level and vehicle for fluid leakage.
9Fill with DOT 4 (or DOT 3) brake fluid if necessary.
Clutch9Check operation, condition and free play.
3-5, 6-21
9Adjust if necessary.
9Check for smooth operation.
Throttle grip and housing9Lubricate.6-17, 6-27
9Adjust throttle cable free play if necessary.
Engine oil9Check oil level.
3-9
9Fill with oil if necessary.
Transmission oil9Check oil level.
6-11 ~ 6-12
9Fill with oil if necessary.
Coolant9Check coolant level.
6-12
9Fill with coolant if necessary.
Drive chain9Check chain slack and condition.
6-26 ~ 6-27
9Adjust if necessary.
Wheels and tires9Check tire pressure, wear, damage and spoke tightness.
6-18 ~ 6-20
9Tighten spokes if necessary.
Control and meter cable9Check for smooth operation.
6-27
9Lubricate if necessary.
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5-1
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w8 8
Before riding this motorcycle,
become thoroughly familiar
with all operating controls and
their functions. Consult a
Yamaha dealer regarding any
control or function that you do
not thoroughly understand.
8 8
Never start your engine or let
it run for any length of time in
a closed area. The exhaust
fumes are poisonous and can
cause loss of consciousness
and death within a short time.
Always operate your motorcy-
cle in an area with adequate
ventilation.
8 8
Before starting out, always be
sure the sidestand is up.
Failure to retract the sidestand
completely can result in a seri-
ous accident when you try to
turn a corner.
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Starting the engineNOTE:
This motorcycle is equipped with an
ignition circuit cut-off system. The
engine can be started only under one
of the following conditions:
8The transmission is in neutral.
8The sidestand is up, the trans-
mission is in gear and the clutch
is disengaged.
The motorcycle must not be ridden
when the sidestand is down.
EW000056
wBefore going through the following
steps, check the function of the
sidestand switch. (Refer to page
3-16.)
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OPERATION AND IMPORTANT RIDING POINTS
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6-5
PERIODIC MAINTENANCE AND MINOR REPAIR
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3
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EAU03884
NOTE:
8The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
8Hydraulic brake service
9Regularly check and, if necessary, correct the brake fluid level.
9Every two years replace the internal components of the brake master cylinders and calipers, and change the
brake fluid.
9Replace the brake hoses every four years and if cracked or damaged.21
*Carburetor¥Check starter (choke) operation.
¥Adjust engine idling speed.ÖÖÖÖÖÖ
22*Autolube pump¥Check operation.
¥Bleed if necessary.ÖÖÖÖ
23Transmission oil¥Check oil level.ÖÖÖÖÖÖ
¥Change.ÖÖ
24*Cooling system¥Check coolant level and vehicle for coolant leakage.ÖÖÖÖÖ
¥Change.Every 3 years
25*Front and rear brake
switches¥Check operation.ÖÖÖÖÖÖ
26Moving parts and cables¥Lubricate.ÖÖÖÖÖ
27*Lights, signals and
switches¥Check operation.
¥Adjust headlight beam.ÖÖÖÖÖÖ NO.ITEMCHECK OR MAINTENANCE JOBODOMETER READING (´ 1,000 km)
ANNUAL
CHECK
16121824
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