engine YAMAHA DT125R 2000 User Guide

3-10
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
ON
FUEL
RES
OFF
1
ON
1.Arrow mark positioned ÒONÓON
With the lever in this position, fuel
flows to the carburetor. Normal riding
is done with the lever in this position.ON: normal position
a
b
1
RES
This indicates reserve. If you run out
of fuel while riding, move the lever to
this position. Fill the tank at the first
opportunity. Be sure to set the lever
back to ÒONÓ after refueling!
EAU02976
Starter (choke) Ò1ÓStarting a cold engine requires a rich-
er air-fuel mixture. A separate starter
circuit supplies this mixture.
Move in direction ato turn on the
starter (choke).
Move in direction bto turn off the
starter (choke).1.Starter (choke) Ò1Ó
OFF
ONFUEL RES
1
RES
1.Arrow mark positioned ÒRESÓRES: reserve position
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3-11
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
1
EAU00212
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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3-15
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
EC000023
cCThe Y.P.V.S. was set at the
Yamaha factory after many tests. If
the settings are disturbed by
someone without sufficient techni-
cal knowledge, poor engine perfor-
mance and damage may result.The Y.P.V.S. operation can be heard
in the following instances:
8When the main switch is turned
on and the engine is started.
8When the engine stalls while the
main switch is on.
EC000024
cCIf the Y.P.V.S. does not operate,
ask a Yamaha dealer to inspect the
vehicle.
1
1.Y.P.V.S.
EAU00326
Y.P.V.S. (Yamaha Power
Valve System)The Y.P.V.S. is a vital part of the
engine and requires very sophisticat-
ed adjustment. Adjustment should be
left to a Yamaha dealer who has the
professional knowledge and experi-
ence to do so.
EAU00330
SidestandThis model is equipped with an igni-
tion circuit cut-off system. The motor-
cycle must not be ridden when the
sidestand is down. The sidestand is
located on the left side of the frame.
(Refer to page 5-1 for an explanation
of this system.)
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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.
EAU00333
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
EAU01114
PRE-OPERATION CHECKS
1
2
34
5
6
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.
EAU00340
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
1
2
3
45
6
7
8
9
EAU00373
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.
EAU01177
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.)
EAU00372
OPERATION AND IMPORTANT RIDING POINTS
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5-2
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
45
6
7
8
9
IF TRANSMISSION IS IN NEUTRAL
AND SIDESTAND IS DOWN,KICK THE KICK STARTER.
ENGINE WILL START.RETRACT SIDESTAND AND PUT
TRANSMISSION IN GEAR.
MOTORCYCLE CAN BE RIDDEN.
MOTORCYCLE CAN BE RIDDEN.
IF TRANSMISSION IS IN GEAR
AND SIDESTAND IS UP,APPLY THE CLUTCH LEVER AND KICK
THE KICK STARTER.
ENGINE WILL START.
TURN THE MAIN SWITCH TO "ON" AND
THE ENGINE STOP SWITCH TO Ò#Ó.
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5-3
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
45
6
7
8
9 1.Turn the fuel cock to ÒONÓ.
2.Turn the main switch to ÒONÓ and
the engine stop switch to Ò#Ó.
3.Shift the transmission into neu-
tral.
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.4.Turn on the starter (choke) and
completely close the throttle grip.
5.Kick the kick starter to start the
engine.
6.After starting the engine, move
the starter (choke) to the halfway
position.
NOTE:
For maximum engine life, never
accelerate hard with a cold engine!7.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.
EAU01258
Starting a warm engineThe starter (choke) is not required
when the engine is warm.
EC000046
cCSee the ÒEngine break-inÓ section
prior to operating the motorcycle
for the first time.
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5-4
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
45
6
7
8
9
EAU00423
ShiftingThe transmission lets you control the
amount of power you have available
at a given speed for starting, acceler-
ating, climbing hills, etc. The use of
the shift pedal is shown in the illustra-
tion.
To shift into neutral, depress the shift
pedal repeatedly until it reaches the
end of its travel, then raise the pedal
slightly.
EC000048
cC8
8
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.
8 8
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.
6
5
4
3
2
1 N
1
N.Neutral
1.Shift pedal
EAU02937
Recommended shift points
(for Switzerland only)The recommended shift points are
shown in the table below.
Acceleration shift point
km/h
1st ®2nd20
2nd ®3rd30
3rd ®4th40
4th ®5th50
5th ®6th60
NOTE:
When shifting two gears down from
5th to 3rd, bring your motorcycle to a
speed of 35 km/h.
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5-5
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
45
6
7
8
9
EAU00424
Tips for reducing fuel
consumptionYour motorcycleÕs fuel consumption
depends to a large extent on your rid-
ing style. The following tips can help
reduce fuel consumption:
8Warm up the engine before rid-
ing.
8Turn off the starter (choke) as
soon as possible.
8Shift up swiftly and avoid high
engine speeds during accelera-
tion.
8Do not double-clutch or rev the
engine while shifting down and
avoid high engine speeds with
no load on the engine.
8Turn off the engine instead of let-
ting it idle for an extended length
of time, i.e. in traffic jams, at traf-
fic lights or railroad crossings.
EAU00436
Engine break-inThere is never a more important peri-
od 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 vari-
ous parts in the engine wear and pol-
ish themselves to the correct operat-
ing clearances. During this period,
prolonged full throttle operation, or
any condition which might result in
excessive heating of the engine,
must be avoided.
EAU00453
0 ~ 500 km
Avoid operation above 6,000 r/min.
Stop the engine and let it cool for 5 to
10 minutes after every hour of opera-
tion. Vary the speed of the motorcy-
cle from time to time. Do not operate
it at one set throttle position.
500 ~ 1,000 km
Avoid prolonged operation above
7,000 r/min. Rev the motorcycle
freely through the gears, but do not
use full throttle at any time.
EC000060
cCAfter 1,000 km of operation, be
sure to replace the transmission
oil.
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