air condition YAMAHA DT125R 2002 Owners Manual

4-1
EAU01114
PRE-OPERATION CHECKS
4The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpect-
edly, even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leak-
age or loss of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thor-
ough visual inspection, to check the following points before each ride.
EAU03439
Pre-operation check list
ITEM CHECKS PAGE
Fuel•Check fuel level in fuel tank.
•Refuel if necessary.
•Check fuel line for leakage.3-5–3-7
2-stroke engine oil•Check oil level in oil tank.
•If necessary, add recommended oil to specified level.
•Check vehicle for oil leakage.3-8
Transmission oil•Check oil level in transmission case.
•If necessary, add recommended oil to specified level.6-10–6-12
Coolant•Check coolant level in reservoir.
•If necessary, add recommended coolant to specified level.
•Check cooling system for leakage.6-12–6-15
Front brake•Check operation.
•If soft or spongy, have Yamaha dealer bleed hydraulic system.
•Check lever free play.
•Adjust if necessary.
•Check fluid level in reservoir.
•If necessary, add recommended brake fluid to specified level.
•Check hydraulic system for leakage.3-5, 6-23, 6-24–6-26
Rear brake•Check operation.
•If soft or spongy, have Yamaha dealer bleed hydraulic system.
•Check fluid level in reservoir.
•If necessary, add recommended brake fluid to specified level.
•Check hydraulic system for leakage.3-5, 6-23–6-26
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4-2
PRE-OPERATION CHECKS
4
Clutch•Check operation.
•Lubricate cable if necessary.
•Check lever free play.
•Adjust if necessary.3-4, 6-22
Throttle grip•Make sure that operation is smooth.
•Check free play.
•If necessary, have Yamaha dealer make adjustment or lubricate.6-18, 6-29
Control cables•Make sure that operation is smooth.
•Lubricate if necessary.6-29
Drive chain•Check chain slack.
•Adjust if necessary.
•Check chain condition.
•Lubricate if necessary.6-7–6-28
Wheels and tires•Check for damage.
•Check tire condition and tread depth.
•Check air pressure.
•Correct if necessary.6-19–6-21
Brake and shift pedals•Make sure that operation is smooth.
•Lubricate pedal pivoting points if necessary.6-30
Brake and clutch levers•Make sure that operation is smooth.
•Lubricate lever pivoting points if necessary.6-30
Sidestand•Make sure that operation is smooth.
•Lubricate pivot if necessary.6-31
Chassis fasteners•Make sure that all nuts, bolts and screws are properly tightened.
•Tighten if necessary.— ITEM CHECKS PAGE
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6-1
EAU00462
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU00464
Safety is an obligation of the owner.
Periodic inspection, adjustment and
lubrication will keep your vehicle in
the safest and most efficient condi-
tion possible. The most important
points of inspection, adjustment, and
lubrication are explained on the fol-
lowing pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a
general guide under normal riding
conditions. However, DEPENDING
ON THE WEATHER, TERRAIN,
GEOGRAPHICAL LOCATION, AND
INDIVIDUAL USE, THE MAINTE-
NANCE INTERVALS MAY NEED TO
BE SHORTENED.
EW000060
wIf you are not familiar with motor-
cycle maintenance work, have a
Yamaha dealer do it for you.
EAU01175
Owner’s tool kitThe owner’s tool kit is located behind
panel B. (See page 6-8 for panel
removal and installation procedures.)
The service information included in
this manual and the tools provided in
the owner’s tool kit are intended to
assist you in the performance of pre-
ventive maintenance and minor
repairs. However, additional tools
such as a torque wrench may be nec-
essary to perform certain mainte-
nance work correctly.
1
1. Owner’s tool kit
NOTE:
If you do not have the tools or experi-
ence required for a particular job,
have a Yamaha dealer perform it for
you.
EW000063
wModifications not approved by
Yamaha may cause loss of perfor-
mance and render the vehicle
unsafe for use. Consult a Yamaha
dealer before attempting any
changes.
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6-9
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU01833
Checking the spark plugThe spark plug is an important
engine component, which is easy to
check. Since heat and deposits will
cause any spark plug to slowly erode,
the spark plug should be removed
and checked in accordance with the
periodic maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
To remove the spark plug
1. Remove the spark plug cap.
1
1. Spark plug cap
To check the spark plug
1. Check that the porcelain insula-
tor around the center electrode
of the spark plug is a medium-to-
light tan (the ideal color when the
motorcycle is ridden normally).NOTE:
If the spark plug shows a distinctly
different color, the engine could be
defective. Do not attempt to diagnose
such problems yourself. Instead,
have a Yamaha dealer check the
motorcycle.2. Check the spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and
replace it if necessary. 2. Remove the spark plug as
shown, with the spark plug
wrench included in the owner’s
tool kit.
1
1. Spark plug wrench
Specified spark plug:
BR9ES (NGK)
BR8ES (NGK) (CH, A only)
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6-19
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04259
TiresTo maximize the performance, dura-
bility, and safe operation of your
motorcycle, note the following points
regarding the specified tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
EW000082
w8The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the tempera-
ture of the tires equals the
ambient temperature).
8The tire air pressure must be
adjusted in accordance with
the riding speed and with the
total weight of rider, passen-
ger, cargo, and accessories
approved for this model.
8NEVER OVERLOAD THE
MOTORCYCLE! Operation of
an overloaded motorcycle may
result in tire damage, loss of
control, or severe injury. Make
sure that the total weight of
rider, passenger, cargo, and
accessories does not exceed
the specified maximum load
for the vehicle.
8Do not carry along loosely
packed items, which can shift
during a ride.
8Securely pack the heaviest
items close to the center of the
motorcycle and distribute the
weight evenly on both sides.
8Adjust the suspension and tire
air pressure with regard to the
load.
8Check the tire condition and
air pressure before each ride.
EWA00012
wBecause loading has an enormous
impact on the handling, braking,
performance and safety character-
istics of your motorcycle, you
should keep the following precau-
tions in mind.
Tire air pressure
(measured on cold tires)
Load* Front Rear
Up to 90 kg125 kPa
(1.25 kgf/cm
2,
1.25 bar)150 kPa
(1.50 kgf/cm
2,
1.50 bar)
90 kg–
maximum150 kPa
(1.50 kgf/cm
2,
1.50 bar175 kPa
(1.75 kgf/cm
2,
1.75 bar)
Off-road riding125 kPa
(1.25 kgf/cm
2,
1.25 bar)150 kPa
(1.50 kgf/cm
2,
1.50 bar)
Maximum load*180 kg
178 kg (CH, A only)
* Total weight of rider, passenger, cargo and
accessories
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6-29
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04034
Checking and lubricating the
throttle grip and cableThe operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated or replaced at the intervals
specified in the periodic maintenance
chart.
EAU02962
Checking and lubricating the
cablesThe operation of all control cables
and the condition of the cables
should be checked before each ride,
and the cables and cable ends
should be lubricated if necessary. If a
cable is damaged or does not move
smoothly, have a Yamaha dealer
check or replace it.
EW000112
wDamage to the outer sheath may
interfere with proper cable opera-
tion and will cause the inner cable
to rust. Replace a damaged cable
as soon as possible to prevent
unsafe conditions.
Recommended lubricant:
Engine oil
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6-31
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU02939
Checking the front forkThe condition and operation of the
front fork must be checked as follows
at the intervals specified in the peri-
odic maintenance and lubrication
chart.
To check the condition
EW000115
wSecurely support the motorcycle
so that there is no danger of it
falling over.Check the inner tubes for scratches,
damage and excessive oil leakage.To check the operation
1. Place the motorcycle on a level
surface and hold it in an upright
position.
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and
rebounds smoothly.
EC000098
cCIf any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or
repair it.
EAU03165
Checking and lubricating the
sidestandThe operation of the sidestand
should be checked before each ride,
and the sidestand pivot and metal-to-
metal contact surfaces should be
lubricated if necessary.
EW000113
wIf the sidestand does not move up
and down smoothly, have a
Yamaha dealer check or repair it.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
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