YAMAHA TW125 2003 Owner's Guide

5-4
OPERATION AND IMPORTANT RIDING POINTS
5
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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:
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 1,000 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 1,000 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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0–500 km
Avoid prolonged operation above 1/3
throttle.
500–1,000 km
Avoid prolonged operation above 1/2
throttle.
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cC
After 1,000 km of operation, the
engine oil must be changed, and
the oil filter element and the oil
strainer cleaned.
1,000 km and beyond
The vehicle can now be operated
normally.
EC000049
cC
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.
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5-5
OPERATION AND IMPORTANT RIDING POINTS
5
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Parking
When parking, stop the engine,
remove the key from the main switch,
and then turn the fuel cock lever to
“OFF”.
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w
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.
RES
ONFUEL
OFF
1
1. Arrow mark positioned over “OFF”
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6-1
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
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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.
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w
If you are not familiar with motor-
cycle maintenance work, have a
Yamaha dealer do it for you.
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Owner’s tool kit
The owner’s tool kit is located behind
panel B. (See page 6-6 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.
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w
Modifications 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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6-2
PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Periodic maintenance and lubrication chartPeriodic maintenance and lubrication chart
NOTE:
8The annual checks must be performed every year, except if a kilometer-based maintenance is performed instead.
8From 30,000 km, repeat the maintenance intervals starting from 6,000 km.
8Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and
technical skills.
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1,000 km)
ANNUAL
CHECK
1 6 12 18 24
1
*Fuel line•Check fuel hoses and vacuum hose for cracks or damage.√√√√ √
2 Spark plug•Check condition.
•Clean and regap.√√
•Replace.√√
3
*Valves•Check valve clearance.
•Adjust.√√√√
4 Air filter element•Clean.√√
•Replace.√√
5 Clutch•Check operation.
•Adjust.√√√√√
6
*Front brake•Check operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)√√√√√ √
•Replace brake pads.Whenever worn to the limit
7
*Rear brake•Check operation and adjust brake pedal free play.√√√√√ √
•Replace brake shoes.Whenever worn to the limit
8
*Brake hose•Check for cracks or damage.√√√√ √
•Replace. (See NOTE on page 6-4.)Every 4 years
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6-3
PERIODIC MAINTENANCE AND MINOR REPAIR
6
9*Wheels•Check runout, spoke tightness and for damage.
•Tighten spokes if necessary.√√√√
10
*Tires•Check tread depth and for damage.
•Replace if necessary.
•Check air pressure.
•Correct if necessary.√√√√ √
11
*Wheel bearings•Check bearing for looseness or damage.√√√√
12
*Swingarm•Check operation and for excessive play.√√√√
•Lubricate with lithium-soap-based grease. Every 24,000 km
13 Drive chain•Check chain slack.
•Make sure that the rear wheel is properly aligned.
•Clean and lubricate.Every 500 km and after washing
the motorcycle or riding in the rain
14
*Steering bearings•Check bearing play and steering for roughness.√√√√√
•Lubricate with lithium-soap-based grease.Every 24,000 km
15
*Chassis fasteners•Make sure that all nuts, bolts and screws are properly tightened.√√√√ √
16 Sidestand•Check operation.
•Lubricate.√√√√ √
17
*Sidestand switch•Check operation.√√√√√ √
18
*Front fork•Check operation and for oil leakage.√√√√
19
*Shock absorber
assembly•Check operation and shock absorber for oil leakage.√√√√
20
*
Rear suspension relay
arm and connecting arm
pivoting points•Check operation.√√√√
•Lubricate with lithium-soap-based grease.√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1,000 km)
ANNUAL
CHECK
1 6 12 18 24
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6-4
PERIODIC MAINTENANCE AND MINOR REPAIR
6EAU03541
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 cylinder and caliper, 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.√√√√√ √
22 Engine oil•Change.
•Check oil level and vehicle for oil leakage.√√√√√ √
23 Engine oil filter element•Clean.√√√
24
*Engine oil strainer•Clean.√
25
*Front and rear brake
switches•Check operation.√√√√√ √
26 Moving parts and cables•Lubricate.√√√√ √
27
*Throttle grip housing
and cable•Check operation and free play.
•Adjust the throttle cable free play if necessary.
•Lubricate the throttle grip housing and cable.√√√√ √
28
*Lights, signals and
switches•Check operation.
•Adjust headlight beam.√√√√√ √ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1,000 km)
ANNUAL
CHECK
1 6 12 18 24
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6-5
PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Removing and installing
panels
The panels shown above need to be
removed to perform some of the
maintenance jobs described in this
chapter. Refer to this section each
time a panel needs to be removed
and installed.
1
1. Panel A
1
1. Panel B
EAU01492
Panel A
To remove the panel
Remove the screws, and then pull
the panel out at the area shown.
2
1
1. Panel A
2. Screw (×2)
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6-6
PERIODIC MAINTENANCE AND MINOR REPAIR
6 To install the panel
Place the panel in the original posi-
tion, and then install the screws.
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Panel B
To remove the panel
Pull the panel off as shown.
1
1. Panel B
To install the panel
Place the panel in the original posi-
tion.
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6-7
PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Checking the spark plug
The 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
2. Remove the spark plug as
shown, with the spark plug
wrench included in the owner’s
tool kit.
1
1. Spark plug wrench
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6-8
PERIODIC MAINTENANCE AND MINOR REPAIR
6 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.To install the spark plug
1. Measure the spark plug gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specification.
2. Clean the surface of the spark
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then
tighten it to the specified torque.
a
a. Spark plug gap
NOTE:
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is
1/4–1/2 turn past finger tight.
However, the spark plug should be
tightened to the specified torque as
soon as possible.
4. Install the spark plug cap.
Spark plug gap:
0.6–0.7 mm
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf)
Specified spark plug:
DR8EA (NGK)
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