engine YAMAHA BREEZE 2002 Service Manual

8-15
Transmission oil replacement
1. Place the machine on a level place.
2. Warm up the engine for several minutes,
and stop it.
3. Place a container under the engine.
4. Remove filler cap and drain bolt to drain the
oil.
5. Install the drain bolt and tighten to specifica-
tion.
6. Fill the engine with oil and install the filler
cap.
q
1. Drain bolt1. Boulon de vidange1. Perno de drenaje
Tightening torque
Drain bolt:
20 Nm (2.0 m0kg)
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8-17
cC
8Be sure to use motor oils that do not con-
tain anti-friction modifiers. Passenger car
motor oils (often labeled “Energy
Conserving”) contain anti-friction addi-
tives which will cause clutch and/or starter
clutch slippage, resulting in reduced com-
ponent life and poor engine performance.
8Be sure no foreign material enters the
crankcase.
Recommended oil:
See page 10-2
Oil quantity:
Total amount
0.7 L
Periodic oil change
0.65 L
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8-19
7. Start the engine and warm up for a few min-
utes. While warming up, check for oil leak-
age. If oil leakage is found, stop the engine
immediately, and check for the cause.
8. Check the oil level.
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8-21
EBU00286
Spark plug inspection
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of the
spark plug can indicate the condition of the
engine.
For example, a very white center electrode
porcelain color could indicate an intake air leak
or carburetion problem for that cylinder. Do not
attempt to diagnose such problems yourself.
Instead, take the machine to a Yamaha dealer.
You should periodically remove and inspect the
spark plug because heat and deposits will cause
the spark plug to slowly break down and erode.
If electrode erosion becomes excessive, you
should replace the spark plug with one of the
proper type.
Standard spark plug:
BR8ES (NGK)
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8-27
3. Remove the air filter element, and separate
it from the guide.
4. Wash the element gently but thoroughly in
solvent.
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Always use parts cleaning solvent to clean
the air filter element. Never use low flash
point solvents or gasoline to clean the air fil-
ter element because the engine could catch
fire or explode.
5. Squeeze the excess solvent out of the filter
and let it dry.
cC
Do not twist the filter element when squeez-
ing it.
q
w
1. Air filter element 2. Element guide1. Elément du filtre à air 2. Guide de l’élément1. Elemento filtrante de aire 2. Guía del elemento
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8-31
NOTE:
The air filter element should be cleaned every
20 ~ 40 hours. It should be cleaned and lubricat-
ed more often if the machine is operated in
extremely dusty areas. Each time filter element
maintenance is performed, check the air inlet to
the filter case for obstructions. Check the air
cleaner rubber joint to the carburetor and mani-
fold fittings for an air-tight seal. Tighten all fit-
tings securely to avoid the possibility of unfil-
tered air entering the engine.
cC
Never operate the engine with the air filter
element removed. This will allow unfiltered
air to enter, causing rapid engine wear and
possible engine damage. Additionally, opera-
tion without the filter element will affect car-
buretor jetting with subsequent poor perfor-
mance and possible engine overheating.
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8-33
EBU00298
Carburetor settings
In extremely cold weather, it is necessary to
change the carburetor settings to maintain opti-
mum engine performance and to prevent engine
damage.
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8Improperly servicing or adjusting the car-
buretor could cause malfunction with the
possibility of an accident or the carburetor
could leak fuel, which would be a fire haz-
ard.
8Carburetor adjustments should only be
performed by a Yamaha dealer. Do not
attempt to perform these procedures
unless you have mechanical knowledge
and the necessary tools.
8Do not perform this procedure while the
engine is hot. Place a rag under the carbu-
retor to catch any fuel. Wipe up any spilled
fuel completely.
8After servicing the carburetor, always
check throttle operation before operating
the ATV to make sure it is working correct-
ly.
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8-45
EBU00301
Idle speed adjustment
NOTE:
A diagnostic tachometer must be used for this
procedure.
1. Start the engine and warm it up for a few
minutes at approximately 1,000 to 2,000
r/min. Occasionally rev the engine to 4,000
to 5,000 r/min. The engine is warm when it
quickly responds to the throttle.
2. Connect the tachometer and set the idle to
the specified idling speed by adjusting the
throttle stop screw. Turn the screw in to
increase engine speed, and out to decrease
engine speed.
q
1. Throttle stop screw1. Vis de butée de papillon1. Tornillo tope del acelerador
Specified idle speed:
1,450 ~1,550 r/min
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8-47
EBU00307
Throttle lever adjustment
NOTE:
Adjust the engine idling speed before adjusting
the throttle lever free play.
1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle lever
free play is 4 ~ 6 mm.
3. Tighten the locknut.
q
w
a
1. Adjusting bolt 2. Locknut a. Free play1. Boulon de réglage 2. Contre-écrou a. Jeu1. Perno de ajuste 2. Contratuerca a. Juego libre
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8-59
EBU00539
Clutch adjustment
The clutch lever free play should be 2 ~ 3 mm. If
the free play is incorrect, adjust as follows.
1. Loosen the locknut.
2. Turn the adjusting bolt so that clutch lever
free play is 2 ~ 3 mm.
3. Tighten the locknut.
EBU00349
Autolube pump adjustment
The Autolube pump is a vital part of the engine
and requires very sophisticated adjustment.
Most adjusting should be left to a Yamaha deal-
er who has the professional knowledge and
experience to do so.
qw
a
1. Adjusting bolt 2. Locknut a. Free play1. Boulon de réglage 2. Contre-écrou a. Jeu1. Perno de ajuste 2. Contratuerca a. Juego libre
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