2000 YAMAHA DT125R maintenance

6-7
PERIODIC MAINTENANCE AND MINOR REPAIR
6
1
1.Screw (´3)
EAU01534*
Cowling BTo remove
Remove the screws and pull outward
as shown.
To install
Place in the original position and
install the screws. To install
Place in the original position and
install the screws.
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1
1
EAU01534*
Cowling CTo remove
Remove the screws and pull outward
as shown.1.Screw (´3)1.Panel D
To install
Place in the original position and
install the screws.
EAU01122
Panel removal and
installationThe panels illustrated need to be
removed to perform some of the
maintenance described in this chap-
ter.
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1
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1
Refer to this section each time a
panel has to be removed or rein-
stalled.
EAU01535*
Panel DTo remove
Remove the screw and pull outward
as shown.
To install
Place the panel in the original posi-
tion and install the screw.
EAU01535*
Panel ETo remove
Remove the screw and pull outward
as shown.
To install
Place the panel in the original posi-
tion and install the screw.
1.Panel E1.Screw1.Screw
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1
EAU01833
Spark plugRemoval
1.Remove the spark plug cap.2.Use the spark plug wrench in the
tool kit to remove the spark plug
as shown.Inspection
The spark plug is an important
engine component and is easy to
inspect. The condition of the spark
plug can indicate the condition of the
engine.
The ideal color on the white insulator
around the center electrode is a
medium-to-light tan color for a motor-
cycle that is being ridden normally.
Do not attempt to diagnose such
problems yourself. Instead, take the
motorcycle to a Yamaha dealer. You
should periodically remove and
inspect the spark plug because heat
and deposits will cause any spark
plug to slowly break down and erode.
If electrode erosion becomes exces-
sive, or if carbon and other deposits
are excessive, you should replace
the spark plug with the specified plug.1.Spark plug cap
Specified spark plug:
BR9ES (NGK)
BR8ES (NGK) (CH, A only)
1
1.Spark plug wrench
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9 Spark plug gap:
0.7 ~ 0.8 mm
Tightening torque:
Spark plug:
20 Nm (2.0 m
0kg)
1
3 2
EAU03109
Transmission oilOil level inspection
1.Place the motorcycle on a level
place and hold it in an upright
position. Warm up the engine for
several minutes.NOTE:
Be sure the motorcycle is positioned
straight up when checking the oil
level. A slight tilt toward the side can
result in false readings.1.Level window
2.Maximum level
3.Minimum level
Installation
1.Measure the electrode gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specification.
2.Clean the gasket surface. Wipe
off any grime from the threads.
3.Install the spark plug and tighten
it to the specified torque.
1
1.Spark plug gap
NOTE:
If a torque wrench is not available
when you are installing a spark plug,
a good estimate of the correct torque
is 1/4 to 1/2 turn past finger tight.
Have the spark plug tightened to the
specified torque as soon as possible.4.Install the spark plug cap.
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95.Fill the engine with sufficient oil
to reach the specified level.
Install the oil filler cap and tight-
en it.
EC000079
cCDo not put in any chemical addi-
tives. Transmission oil also lubri-
cates the clutch and additives
could cause clutch slippage.6.Start the engine and warm up for
a few minutes. While warming
up, check for oil leakage. If oil
leakage is found, stop the engine
immediately and check for
cause. Recommended oil:
See page 8-1.
Oil quantity:
Total amount: 0.8 L
Periodic oil change: 0.75 L
1
Transmission oil replacement
1.Warm up the engine for several
minutes.
2.Stop the engine. Place an oil pan
under the engine to catch the oil
and remove the oil filler cap.
3.Remove the drain bolt and drain
the oil.
4.Install the drain bolt and tighten it
to the specified torque.1.Drain bolt
Tightening torque:
Drain bolt:
15 Nm (1.5 m
0kg)
1
2.With the engine stopped, check
the oil level through the level
window located at the right side
crankcase cover.NOTE:
Wait a few minutes until the oil level
settles before checking.3.The oil level should be between
the maximum and minimum level
on the level window. If the level
is low, add sufficient oil to raise it
to the specified level.1.Oil filler cap
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EAU01808
Cooling system1.Remove panel D. (See page 6-9
for panel removal and installation
procedures.)
2.Check the coolant level in the
reservoir tank when the engine is
cold as the coolant level will vary
with engine temperature. The
coolant level should be between
the maximum and minimum
marks.
3.If the level is low, add coolant or
distilled water to raise it to the
specified level.4.Install the panel.
EC000080
cCHard water or salt water is harmful
to the engine. You may use dis-
tilled water if you canÕt get soft
water.NOTE:
If water is added, have a Yamaha
dealer check the antifreeze content of
the coolant as soon as possible.If your motorcycle overheats, see
page 6-41 for details.
2
1
1.Maximum level mark
2.Minimum level mark
EAU03101
Changing the coolant1.Put the motorcycle on a level
place.
2.Remove cowling C and panel D.
(See page 6-8 ~ 6-9 for cowling
and panel removal and installa-
tion procedures.)
3.Remove the radiator cap stopper
bolt and the radiator cap.
12
1.Stopper bolt
2.Radiator cap
Reservoir tank capacity:
0.35 L
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98.Install the reservoir tank hose.
9.Pour the recommended coolant
into the radiator until it is full.
Recommended antifreeze:
High quality ethylene glycol
antifreeze containing
corrosion inhibitors for
aluminum engines.
Antifreeze and water mixing ratio:
1:1
Total amount:
1.05 L
Reservoir tank capacity:
0.35 L
4.Place a container under the
engine and remove the coolant
drain bolt.5.Disconnect the reservoir tank
hose on the reservoir tank side
and drain the coolant from the
reservoir tank.
6.After draining the coolant, thor-
oughly flush the cooling system
with clean tap water.
7.Replace the coolant drain bolt
washer if it is damaged and tight-
en the coolant drain bolt to the
specified torque.
1
13
2
1.Drain bolt1.Reservoir tank hose
2.Maximum level mark
3.Minimum level mark
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m
0kg)
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