check engine YAMAHA PW50 2011 User Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
7-8
7
EAU40893
Transmission oil The transmission oil must be checked
for oil leakage before each ride. If any
leakage is found, have a Yamaha deal-
er check and repair the motorcycle. In
addition, the transmission oil must be
changed at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Place the motorcycle on the cen-
terstand.
2. Place an oil pan under the trans-
mission to collect the used oil.
3. Remove the transmission oil filler
cap, the transmission oil drain bolt
and its gasket to drain the oil from
the transmission.4. Install the transmission oil drain
bolt and its new gasket, and then
tighten the bolt to the specified
torque.
5. Refill with the specified amount of
the recommended transmission
oil, and then install and tighten the
oil filler cap.
NOTICE
ECA10452


In order to prevent clutch slip-
page (since the transmission oil
also lubricates the clutch), do
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-
rial enters the transmission.
6. Start the engine, and then let it idle
for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the cause.
1. Transmission oil filler cap
1
1. Transmission oil drain bolt
2. Gasket
Tightening torque:
Transmission oil drain bolt:
14 Nm (1.4 m·kgf, 10 ft·lbf)
Recommended transmission oil:
See page 9-1.
Oil change quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
12
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-11
7
EAU39930
Adjusting the carburetor The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most car-
buretor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in the
following section, however, may be ser-
viced by the owner as part of routine
maintenance.NOTICE
ECA10550
The carburetor has been set and ex-
tensively tested at the Yamaha fac-
tory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
EAU21362
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.TIPA diagnostic tachometer is needed to
make this adjustment.1. Attach the tachometer to the spark
plug lead.
2. Start the engine and warm it up for
several minutes at 1000–2000
r/min while occasionally revving it
to 4000–5000 r/min.TIPThe engine is warm when it quickly re-
sponds to the throttle.3. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
TIPIf the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.1. Throttle stop screwEngine idling speed:
1650–1750 r/min
1(a) (b)
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-15
7
EAU41052
Checking the front and rear
brake shoes The front and rear brake shoes must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.TIPThe wheels must be removed to check
brake shoe lining thickness.

To remove the front wheel: See
page 7-18.


To remove the rear wheel: See
page 7-20.
FrontRear
If the lining thickness of a brake shoe is
less than 1.5 mm (0.06 in), have a
Yamaha dealer replace the brake
shoes as a set.
TIPBe sure to measure the brake lining at
the thinnest portion.
EAU41842
Checking and lubricating the
cables The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING! Damage to the outer
housing of cables may result in in-
ternal rusting and cause interfer-
ence with cable movement. Replace
damaged cables as soon as possi-
ble to prevent unsafe conditions.[EWA10711]Recommended lubricant:
Yamaha Chain and Cable Lube or 4-
stroke engine oil
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-16
7
EAU23113
Checking and lubricating the
throttle grip and cable The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated by a
Yamaha dealer at the intervals speci-
fied in the periodic maintenance chart.
The throttle cable is equipped with a
rubber boot. Make sure that the boot is
securely installed. Even though the
boot is installed correctly, it does not
completely protect the cable from water
entry. Therefore, use care not to pour
water directly onto the boot or cable
when washing the vehicle. If the cable
or boot becomes dirty, wipe clean with
a moist cloth.
EAU23120
Adjusting the Autolube pump The Autolube pump is a vital and so-
phisticated component of the engine,
which must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
EAU43631
Lubricating the front and rear
brake levers The pivoting points of the front and rear
brake levers must be lubricated at the
intervals specified in the periodic main-
tenance and lubrication chart.
Recommended lubricant:
Lithium-soap-based grease
U5PG8AE0.book Page 16 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-24
7
EAU25972
Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is
enough fuel.
There is
no fuel.
Supply fuel.
Operate the kickstarter.2. Compression
There is compression.
There is
no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wet
DryWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.The engine does not start.
Have a Yamaha dealer check the vehicle.
Open the throttle halfway and operate
the kickstarter.
Check the compression.
The engine does not start.
Check the compression.
U5PG8AE0.book Page 24 Thursday, April 8, 2010 8:37 AM

MOTORCYCLE CARE AND STORAGE
8-4
8 2. For motorcycles equipped with a
fuel cock that has an “S” (stop) po-
sition: Turn the fuel cock lever to
“S”.
3. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
5. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap. WARNING! To
prevent damage or injury
from sparking, make sure to
ground the spark plug elec-
trodes while turning the en-
gine over.
[EWA10951]
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the center-
stand.
7. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.TIPMake any necessary repairs before
storing the motorcycle.
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INDEXAAcceleration and deceleration................. 6-2
Air filter element, cleaning....................... 7-9
Autolube pump, adjusting ..................... 7-16BBrake lever, front..................................... 4-2
Brake lever, rear ..................................... 4-3
Brake levers, lubricating........................ 7-16
Brake shoes, checking .......................... 7-15
Braking .................................................... 6-2CCables, checking and lubricating .......... 7-15
Carburetor, adjusting ............................ 7-11
Care ........................................................ 8-1
Centerstand, checking and
lubricating ........................................... 7-17EEngine break-in ....................................... 6-3
Engine idling speed............................... 7-11
Engine oil ................................................ 4-5
Engine, starting a warm .......................... 6-1
Engine stop switch .................................. 4-1FFront and rear brake lever free play,
adjusting ............................................. 7-14
Front fork, checking .............................. 7-17
Fuel ......................................................... 4-3
Fuel cock................................................. 4-6
Fuel tank breather hose .......................... 4-5
Fuel tank cap .......................................... 4-3HHandlebar switch .................................... 4-1IIdentification numbers ........................... 10-1
KKickstarter............................................... 4-7LLabels, location....................................... 1-1MMaintenance and lubrication, periodic .... 7-4
Maintenance, emission control system... 7-3
Matte color, caution ................................ 8-1
Middle and final gear cases .................... 7-9
Model label ........................................... 10-1PParking ................................................... 6-4
Part locations .......................................... 3-1
Power reduction plate, removing ............ 7-7SSafety information................................... 2-1
Seat ........................................................ 4-7
Spark arrester, cleaning ....................... 7-10
Spark plug, checking .............................. 7-6
Specifications ......................................... 9-1
Speed limiter and power reduction
plate ..................................................... 4-1
Starter (choke) lever ............................... 4-6
Starting and warming up a cold
engine .................................................. 6-1
Starting off .............................................. 6-2
Steering, checking ................................ 7-18
Storage ................................................... 8-3TThrottle cable free play, checking ......... 7-12
Throttle grip and cable, checking and
lubricating ........................................... 7-16
Tires...................................................... 7-12
Tool kit .................................................... 7-2Transmission oil ...................................... 7-8
Troubleshooting .................................... 7-23
Troubleshooting chart ........................... 7-24
VVehicle Emission Control Information
label (For Canada) .............................. 10-2
Vehicle identification number ................ 10-1WWheel bearings, checking ..................... 7-18
Wheel (front) ......................................... 7-18
Wheel (rear) .......................................... 7-20
Wheels .................................................. 7-13
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