engine YAMAHA XVS125 2000 User Guide

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OPERATION AND IMPORTANT RIDING POINTS
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8Become 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 the engine
In 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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8Before starting the engine,
check the function of the igni-
tion circuit cut-off system
according to the procedure
described on page 3-10.
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.
1. Arrow mark positioned over “ON”
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OPERATION AND IMPORTANT RIDING POINTS
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5-2
4. Turn the starter (choke) on and
completely close the throttle.
(See page 3-8 for starter (choke)
operation.)
5. Start the engine by pushing the
start switch.
NOTE:
If the engine fails to start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to pre-
serve the battery. Do not crank the
engine more than 10 seconds on any
one attempt.
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If the oil level warning light flickers
or remains on after starting, imme-
diately stop the engine, and then
check the engine oil level and the
vehicle for oil leakage. If neces-
sary, add engine oil, and then
check the warning light again. If
the warning light does not go off
after starting with sufficient engine
oil, have a Yamaha dealer check
the electrical circuit.
6. After starting the engine, move
the starter (choke) lever back
halfway.
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For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when
the engine is cold.
7. When the engine is warm, turn
the starter (choke) off.
NOTE:
The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off.
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OPERATION AND IMPORTANT RIDING POINTS
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Starting a warm engine
Follow the same procedure as for
starting a cold engine with the excep-
tion that the starter (choke) is not
required when the engine is warm.
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Shifting
Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing
hills, etc.
The gear positions are shown in the
illustration.
NOTE:
To shift the transmission into the neu-
tral position, press the shift pedal
down repeatedly until it reaches the
end of its travel, and then slightly
raise it.
1. Shift pedal
N. Neutral position
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8Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long
distances. The transmission is
properly lubricated only when
the engine is running.
Inadequate lubrication may
damage the transmission.
8Always use the clutch while
changing gears to avoid dam-
aging the engine, transmis-
sion, and drive train, which are
not designed to withstand the
shock of forced shifting.
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OPERATION AND IMPORTANT RIDING POINTS
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Recommended shift points
(for Switzerland only)
The recommended shift points during
acceleration are shown in the table
below.
NOTE:
When shifting down two gears at a
time, reduce the speed accordingly
(e.g., down to 35 km/h when shifting
from 4th to 2nd gear).
Shift point (km/h)
1st ®2nd 23
2nd ®3rd 36
3rd ®4th 50
4th ®5th 60
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Tips for reducing fuel
consumption
Fuel consumption depends largely on
your riding style. Consider the follow-
ing tips to reduce fuel consumption:
8Thoroughly warm up the engine.
8Turn the starter (choke) off as
soon as possible.
8Shift up swiftly, and avoid high
engine speeds during accelera-
tion.
8Do not rev the engine while shift-
ing down, and avoid high engine
speeds with no load on the
engine.
8Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at
traffic lights or at railroad cross-
ings).
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Engine break-in
There is never a more important peri-
od in the life of your engine than the
period between 0 and 1,600 km. For
this reason, you should read the fol-
lowing material carefully.
Since the engine is brand new, do
not put an excessive load on it for the
first 1,600 km. The various parts in
the engine wear and polish them-
selves to the correct operating clear-
ances. During this period, prolonged
full-throttle operation or any condition
that might result in engine overheat-
ing must be avoided.
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0–1,000 km
Avoid prolonged operation above 1/3
throttle.
1,000–1,600 km
Avoid prolonged operation above 1/2
throttle.
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After 1,000 km of operation, the
engine oil must be changed and
the oil filter element replaced.
1,600 km and beyond
The vehicle can now be operated
normally.
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If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.
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Parking
When parking, stop the engine, and
then remove the key from the main
switch.
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8Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely
to touch them.
8Do not park on a slope or on
soft ground, otherwise the
motorcycle may overturn.
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PERIODIC MAINTENANCE AND MINOR REPAIR
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13 Drive chain¥ Check chain slack.
¥ Adjust if necessary. Make sure that the rear wheel is properly
aligned.
¥ Clean and lubricate.Every 1,000 km and after washing the
motorcycle or riding in the rain
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*Steering bearings¥ Check bearing play and steering for roughness.
¥ Correct accordingly.
¥ Lubricate with lithium-soap-based grease every 24.000 km or 24
months (whichever comes first)ÖÖ
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*Chassis fasteners¥ Make sure that all nuts, bolts and screws are properly tightened.
¥ Tighten if necessary.ÖÖ
16 Sidestand¥ Check operation.
¥ Lubricate and repair if necessary.ÖÖ
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*Sidestand switch¥ Check operation.
¥ Replace if necessary.ÖÖ Ö
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*Front fork¥ Check operation and for oil leakage.
¥ Correct accordingly.Ö
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*Rear shock absorber
assemblies¥ Check operation and shock absorbers for oil leakage.
¥ Replace shock absorber assembly if necessary.Ö
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*Carburetor¥ Check engine idling speed and starter operation.
¥ Adjust if necessary.ÖÖ Ö
21 Engine oil¥ Check oil level and vehicle for oil leakage.
¥ Correct accordingly.
¥ Change. (Warm engine before draining.)ÖÖ Ö
22 Engine oil filter element¥ Replace.ÖÖ
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*Front and rear brake
switches¥ Check operation.
¥ Correct accordingly.ÖÖ Ö
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*Moving parts and cables¥ Lubricate if necessary.ÖÖ No. ITEM CHECKS AND MAINTENANCE JOBSInitial
1,000 kmEvery
6,000 kmEvery
12,000 kmAnnual
check
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6-8
PERIODIC MAINTENANCE AND MINOR REPAIR
6Do not attempt to diagnose such
problems yourself. Instead, take the
motorcycle to a Yamaha dealer. You
should periodically remove and
inspect the spark plugs 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.
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2. Use the spark plug wrench in the
tool kit to remove the spark plugs
as shown.
1. Spark plug wrench
Specified spark plug:
CR7HSA (NGK) or
U22FSR-U (DENSO)
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.
Normally, all spark plugs from the
same engine should have the same
color on the white insulator around
the center electrode. The ideal color
at this point is a medium-to-light tan
color for a motorcycle that is being
ridden normally. If one spark plug
shows a distinctly different color,
there could be something wrong with
the engine.
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To install the spark plugs
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.
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 caps.
Spark plug gap:
0.6 – 0.7 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m0kg)
a
a. Spark plug gap
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Engine oil and oil filter
element
The engine oil level should be
checked before each ride. In addition,
the oil must be changed and the oil
filter element replaced at the intervals
specified in the periodic maintenance
and lubrication chart.
To check the engine oil level
1. Place the motorcycle on a level
surface and hold it in an upright
position.
NOTE:
Make sure that the motorcycle is
positioned straight up when checking
the oil level. A slight tilt to the side
can result in a false reading.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
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93. Wait a few minutes until the oil
settles, and then check the oil
level through the check window
located at the bottom-right side
of the crankcase.
NOTE:
The engine oil should be between the
minimum and maximum level marks.
4. If the engine oil is below the min-
imum level mark, add sufficient
oil of the recommended type to
raise it to the correct level.
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To change the engine oil (with or
without oil filter element replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the
engine to collect the used oil.
1. Engine oil filler cap
3. Remove the engine oil filler cap
and drain bolt to drain the oil
from the crankcase.
NOTE:
Skip steps 4–6 if the oil filter element
is not being replaced.
1. Engine oil drain bolt
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3
1. Oil level window
2. Maximum level mark
3. Minimum level mark
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5. Remove and replace the oil filter
element and O-ring.
6. Install the oil filter element cover
by installing the bolts, then tight-
ening them to the specified
torque.
NOTE:
Make sure that the O-ring is properly
seated.
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7. Install the engine oil drain bolt,
and then tighten it to the speci-
fied torque.
8. Add the specified amount of the
recommended engine oil, and
then install and tighten the oil
filler cap.
Tightening torque:
Oil filter element cover bolt:
10 Nm (1.0 m·kg)
4. Remove the oil filter element
cover by removing the bolts.
1. Bolt (´3) 1. Oil filter element
2. O-ring
2
1
Tightening torque:
Engine oil drain bolt:
23 Nm (2.3 m·kg)
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