2008 YAMAHA PW50 engine oil

TABLE OF CONTENTS
SAFETY INFORMATION
...................1-1
Safe riding ........................................1-1
Location of important labels .............1-4
DESCRIPTION
...................................2-1
Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments..................2-3
INSTRUMENT AND CONTROL
FUNCTIONS
........................................3-1
Handlebar switch .............................3-1
Speed limiter and power reduction
plate .............................................3-1
Front brake lever .............................3-2
Rear brake lever ..............................3-3
Fuel tank cap ...................................3-3
Fuel ..................................................3-3
Fuel tank breather hose ...................3-5
2-stroke engine oil ...........................3-5
Fuel cock .........................................3-5
Starter (choke) lever “
1
” .................3-6
Kickstarter ........................................3-6
Seat .................................................3-7
PRE-OPERATION CHECKS
...............4-1
Pre-operation check list ...................4-2
OPERATION AND IMPORTANT
RIDING POINTS
.................................. 5-1
Starting and warming up a cold
engine .......................................... 5-1
Starting a warm engine ................... 5-1
Starting off ....................................... 5-2
Acceleration and deceleration ......... 5-2
Braking ............................................ 5-2
Engine break-in ............................... 5-3
Parking ............................................ 5-4
PERIODIC MAINTENANCE AND
MINOR REPAIR
.................................. 6-1
Owner’s tool kit ................................ 6-1
Periodic maintenance chart for the
emission control system .............. 6-2
General maintenance and lubrication
chart ............................................. 6-3
Checking the spark plug .................. 6-5
Removing the power reduction
plate ............................................. 6-6
Transmission oil .............................. 6-7
Middle and final gear cases ............ 6-8
Cleaning the air filter element ......... 6-8
Cleaning the spark arrester ............. 6-9
Adjusting the carburetor ................ 6-10
Adjusting the engine idling
speed ......................................... 6-10
Checking the throttle cable free
play ............................................ 6-11
Tires .............................................. 6-11Panel wheels ................................. 6-13
Accessories and replacement
parts ........................................... 6-13
Adjusting the front and rear brake
lever free play ............................ 6-14
Checking the front and rear brake
shoes ......................................... 6-15
Checking and lubricating the
cables ........................................ 6-15
Checking and lubricating the throttle
grip and cable ............................ 6-16
Adjusting the Autolube pump ........ 6-16
Lubricating the front and rear brake
levers ......................................... 6-16
Checking and lubricating the
centerstand ................................ 6-17
Checking the front fork .................. 6-17
Checking the steering ................... 6-18
Checking the wheel bearings ........ 6-18
Front wheel ................................... 6-19
Rear wheel .................................... 6-20
Troubleshooting ............................ 6-23
Troubleshooting chart ................... 6-24
MOTORCYCLE CARE AND
STORAGE
........................................... 7-1
Matte color caution .......................... 7-1
Care ................................................ 7-1
Storage ........................................... 7-3
SPECIFICATIONS
............................. 8-1

DESCRIPTION
2-2
2
3
4
5
6
7
8
9

EAU10420
Right view
3
12
4

1. Spark arrester (page 6-9)
2. Seat (page 3-7)
3. Transmission oil filler cap (page 6-7)
4. 2-stroke engine oil tank (page 3-5)

DESCRIPTION
2-3
1
2
3
4
5
6
7
8
9

EAU10430
Controls and instruments
12
7 345
6

1. Rear brake lever (page 3-3)
2. Starter (choke) lever (page 3-6)
3. 2-stroke engine oil tank cap (page 3-5)
4. Right handlebar switch (page 3-1)
5. Front brake lever (page 3-2)
6. Throttle grip (page 6-11)
7. Fuel tank cap (page 3-3)

INSTRUMENT AND CONTROL FUNCTIONS
3-5
2
34
5
6
7
8
9

EAU13412
Fuel tank breather hose
Before operating the motorcycle:

Check the fuel tank breather hose
connection.

Check the fuel tank breather hose
for cracks or damage, and replace
it if damaged.

Make sure that the fuel tank
breather hose is not blocked, and
clean it if necessary.
EAU13452
2-stroke engine oil
Make sure that there is sufficient
2-stroke engine oil in the oil tank. Add
the recommended 2-stroke engine oil
as necessary.
NOTE:

Make sure that the 2-stroke engine oil
tank cap is properly installed.
EAU40701
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it al-
so.
The fuel cock has two positions:
S (stop)
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.
1. Fuel tank breather hose
1

1. 2-stroke engine oil tank cap
2. Minimum level mark
Recommended oil:
See page 8-1.
Oil quantity:
0.30 L (0.32 US qt) (0.26 Imp.qt)
21

1. Arrow mark pointing to “S” (stop)
1

PRE-OPERATION CHECKS
4-2
2
3
45
6
7
8
9

EAU15605
Pre-operation check list
ITEM CHECKS PAGE
Fuel

Check fuel level in fuel tank.

Refuel if necessary.

Check fuel line for leakage.3-3
2-stroke engine oil

Check oil level in oil tank.

If necessary, add recommended oil to specified level.

Check vehicle for oil leakage.3-5
Middle and final gear cases

Check vehicle for grease leakage. 6-8
Front brake

Check operation.

Lubricate cable if necessary.

Check lever free play.

Adjust if necessary.6-14, 6-15
Rear brake

Check operation.

Lubricate cable if necessary.

Check lever free play.

Adjust if necessary.6-14, 6-15
Throttle grip

Make sure that operation is smooth.

Check cable free play.

If necessary, have Yamaha dealer adjust cable free play and lubricate cable
and grip housing.6-11, 6-16
Control cables

Make sure that operation is smooth.

Lubricate if necessary.6-15
Wheels and tires

Check for damage.

Check tire condition and tread depth.

Check air pressure.

Correct if necessary.6-11, 6-13
Brake levers

Make sure that operation is smooth.

Lubricate lever pivoting points if necessary.6-16
Centerstand

Make sure that operation is smooth.

Lubricate pivot if necessary.6-17

OPERATION AND IMPORTANT RIDING POINTS
5-3
2
3
4
56
7
8
9 Rear
WARNING

EWA14571

Avoid braking hard or suddenly
(especially when leaning over to
one side), otherwise the motor-
cycle may skid or overturn.

Keep in mind that braking on
wet surfaces is much more diffi-
cult.

Ride slowly down a hill, as brak-
ing downhill can be very diffi-
cult.
EAU42030
Engine break-in
There is never a more important period
in the life of your engine than the first 5
hours of riding. It is also important to ac-
custom the rider to the motorcycle dur-
ing this time. Please read the following
information carefully.
Since the engine is brand new, do not
put an excessive load on it for the first 5
hours of operation. The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided. However, momentary
full-throttle operation under load (i.e.,
two to three seconds maximum) does
not harm the engine. Each full-throttle
acceleration should be followed with a
substantial rest period for the engine.
To allow the engine to cool down from
the temporary buildup of heat, cruise at
a lower engine speed.
After the first 5 hours of operation, thor-
oughly check the motorcycle for loose
parts, oil leakage and any other prob-
lems. Be sure to inspect and make ad-justments thoroughly, especially
cables. In addition, check all fittings and
fasteners for looseness, and tighten if
necessary.
CAUTION:

ECA10270
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.

PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
1
2
3
4
5
6
7
8
9
NOTE:

The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
10
*Transmission oil
Check for oil leakage .Correct if necessary.Change.
11
*Front and rear brake
lever pivot
Apply lithium-soap-based grease (all-purpose
grease) lightly.
12
*Centerstand pivot
Check operation.Apply lithium-soap-based grease (all-purpose
grease) lightly.
13
*Shock absorber
assemblies
Check operation and for oil leakage.Replace if necessary.
14
*Control cable
Apply Yamaha chain and cable lube or engine oil
10W-30 lightly.
15
*Throttle grip housing
and cable
Check operation and free play.Apply Yamaha chain and cable lube or engine oil
10W-30 lightly. NO. ITEM CHECK OR MAINTENANCE JOBINITIALTHEREAFTER
EVERY
1
month3
months6
months6
months12
months

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
2
3
4
5
67
8
9

EAU40891
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 oil filler cap and drain
bolt to drain the oil from the trans-
mission.4. Install the transmission oil drain
bolt, and then tighten it to the spec-
ified torque.
5. Add the specified amount of the
recommended transmission oil,
and then install and tighten the oil
filler cap.
CAUTION:

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
Tightening torque:
Transmission oil drain bolt:
14 Nm (1.4 m·kgf, 10.1 ft·lbf)
Recommended transmission oil:
See page 8-1.
Oil change quantity:
0.30 L (0.32 US qt) (0.26 Imp.qt)
1