2010 YAMAHA PW50 fuel cap

TABLE OF CONTENTS
LOCATION OF IMPORTANT
LABELS
............................................. 1-1
SAFETY INFORMATION
.................. 2-1
DESCRIPTION
.................................. 3-1
Left view .......................................... 3-1
Right view ........................................ 3-2
Controls and instruments ................ 3-3
INSTRUMENT AND CONTROL
FUNCTIONS
....................................... 4-1
Handlebar switch ............................ 4-1
Speed limiter and power
reduction plate ............................ 4-1
Front brake lever ............................ 4-2
Rear brake lever ............................. 4-3
Fuel tank cap .................................. 4-3
Fuel ................................................ 4-3
Fuel tank breather hose ................. 4-5
2-stroke engine oil .......................... 4-5
Fuel cock ........................................ 4-6
Starter (choke) lever “ ” ............... 4-6
Kickstarter ...................................... 4-7
Seat ................................................ 4-7
FOR YOUR SAFETY –
PRE-OPERATION CHECKS
.............. 5-1
OPERATION AND IMPORTANT
RIDING POINTS
................................. 6-1Starting and warming up a cold
engine ......................................... 6-1
Starting a warm engine .................. 6-1
Starting off ...................................... 6-2
Acceleration and deceleration ........ 6-2
Braking ........................................... 6-2
Engine break-in .............................. 6-3
Parking ........................................... 6-4
PERIODIC MAINTENANCE AND
ADJUSTMENT
................................... 7-1
Owner’s tool kit ............................... 7-1
Periodic maintenance chart for
the emission control system ....... 7-2
General maintenance and
lubrication chart .......................... 7-3
Checking the spark plug ................. 7-5
Removing the power reduction
plate ............................................ 7-6
Transmission oil ............................. 7-7
Middle and final gear cases ........... 7-8
Cleaning the air filter element ........ 7-8
Cleaning the spark arrester ............ 7-9
Adjusting the carburetor ............... 7-10
Adjusting the engine idling
speed ........................................ 7-10
Checking the throttle cable free
play ........................................... 7-11
Tires ............................................. 7-11
Panel wheels ................................ 7-13Adjusting the front and rear
brake lever free play .................. 7-13
Checking the front and rear
brake shoes ............................... 7-14
Checking and lubricating the
cables ........................................ 7-15
Checking and lubricating the
throttle grip and cable ................ 7-15
Adjusting the Autolube pump ........ 7-16
Lubricating the front and rear
brake levers ............................... 7-16
Checking and lubricating the
centerstand ................................ 7-16
Checking the front fork .................. 7-17
Checking the steering ................... 7-17
Checking the wheel bearings ........ 7-18
Front wheel ................................... 7-18
Rear wheel .................................... 7-20
Troubleshooting ............................ 7-22
Troubleshooting chart ................... 7-24
MOTORCYCLE CARE AND
STORAGE
.......................................... 8-1
Matte color caution ......................... 8-1
Care ................................................ 8-1
Storage ........................................... 8-3
SPECIFICATIONS
............................. 9-1
CONSUMER INFORMATION
........... 10-1
Identification numbers ................... 10-1

DESCRIPTION
3-3
2
34
5
6
7
8
9

EAU10430
Controls and instruments
12
7 345
6

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

INSTRUMENT AND CONTROL FUNCTIONS
4-3
1
2
3
4
5
6
7
8
9

EAU12950
Rear brake lever
The rear brake lever is located on the
left handlebar grip. To apply the rear
brake, pull this lever toward the handle-
bar grip.
EAU13182
Fuel tank cap
To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it clock-
wise.
WARNING

EWA11091
Make sure that the fuel tank cap is
properly closed after filling fuel.
Leaking fuel is a fire hazard.
EAU13221
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING

EWA10881
Gasoline and gasoline vapors are
extremely flammable. To avoid fires
and explosions and to reduce the
risk of injury when refueling, follow
these instructions.
1. Before refueling, turn off the en-
gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters and
clothes dryers.
2. Do not overfill the fuel tank. When
refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank.
1. Rear brake lever
1

1. Fuel tank cap
1

INSTRUMENT AND CONTROL FUNCTIONS
4-4
2
3
45
6
7
8
9
3. Wipe up any spilled fuel immedi-
ately.
NOTICE:
Immediately wipe
off spilled fuel with a clean, dry,
soft cloth, since fuel may deteri-
orate painted surfaces or plastic
parts.

[ECA10071]

4. Be sure to securely close the fuel
tank cap.
WARNING

EWA15151
Gasoline is poisonous and can
cause injury or death. Handle gaso-
line with care. Never siphon gaso-
line by mouth. If you should swallow
some gasoline or inhale a lot of gas-
oline vapor, or get some gasoline inyour eyes, see your doctor immedi-
ately. If gasoline spills on your skin,
wash with soap and water. If gaso-
line spills on your clothing, change
your clothes.
EAU41981
For Canada
NOTICE

ECA15590
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the piston rings as well as to
the exhaust system.
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a pump octane number
[(R+M)/2] of 86 or higher, or a research
octane number of 91 or higher. If
knocking (or pinging) occurs, use agasoline of a different brand or premi-
um unleaded fuel. Use of unleaded fuel
will extend spark plug life and reduce
maintenance cost.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that contain-
ing methanol. Gasohol containing
ethanol can be used if ethanol content
does not exceed 10% (E10). Gasohol
containing methanol is not recom-
mended by Yamaha because it can
cause damage to the fuel system or ve-
hicle performance problems.
Except for Canada
NOTICE

ECA15590
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
1. Fuel tank filler tube
2. Fuel level
2 1

Recommended fuel:
REGULAR UNLEADED GASOLINE
ONLY
Fuel tank capacity:
2.0 L (0.53 US gal, 0.44 Imp.gal)
Recommended fuel:
For Europe: REGULAR UNLEADED
GASOLINE ONLY
Except for Canada and Europe: UN-
LEADED GASOLINE ONLY
Fuel tank capacity:
2.0 L (0.53 US gal, 0.44 Imp.gal)

INSTRUMENT AND CONTROL FUNCTIONS
4-5
1
2
3
4
5
6
7
8
9such as the piston rings as well as to

the exhaust system.
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
91 or higher. If knocking (or pinging) oc-
curs, use a gasoline of a different brand
or premium unleaded fuel. Use of un-
leaded fuel will extend spark plug life
and reduce maintenance costs.
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.
EAU13453
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.
NOTICE

ECA16670
Make sure that the 2-stroke engine
oil tank cap is properly installed.
1. Fuel tank breather hose
1

1. 2-stroke engine oil tank cap
2. Minimum level mark
Recommended oil:
See page 9-1.
Oil quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
21

MOTORCYCLE CARE AND STORAGE
8-4
1
2
3
4
5
6
7
8
9
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 thespark 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.
TIP

Make any necessary repairs before
storing the motorcycle.

9-1
2
3
4
5
6
7
8
9

SPECIFICATIONS
EAU2633X
Dimensions:
Overall length:
1245 mm (49.0 in)
Overall width:
575 mm (22.6 in)
Overall height:
715 mm (28.1 in)
Seat height:
485 mm (19.1 in)
Wheelbase:
855 mm (33.7 in)
Ground clearance:
105 mm (4.13 in)
Minimum turning radius:
1300 mm (51.2 in)
Weight:
With oil and fuel:
39.0 kg (86 lb)
Noise and vibration level:
Noise level (77/311/EEC):
PW50 75.1 dB(A)
Vibration on seat (EN1032, ISO5008):
PW50 Will not exceed 0.5 m/s
2

Vibration on handlebar (EN1032, ISO5008):
PW50 Will not exceed 2.5 m/s
2

Engine:
Engine type:
Air cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49 cm
3

Bore
×
stroke:
40.0
×
39.2 mm (1.57
×
1.54 in)Compression ratio:
6.00 :1
Starting system:
Kickstarter
Lubrication system:
Separate lubrication (Yamaha autolube)

Engine oil:
Type:
YAMALUBE 2 or 2-stroke engine oil (JASO
FC grade) or (ISO EG-C or EG-D grade)
Engine oil quantity:
Quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
Transmission oil:
Type:
YAMALUBE 4 (10W-40) or SAE 10W-40
Oil change quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:
PW50 Regular unleaded gasoline only
PW50Z Regular unleaded gasoline only
(CAN)
PW50Z Unleaded gasoline only
(AUS)(NZL)
Fuel tank capacity:
2.0 L (0.53 US gal, 0.44 Imp.gal)
Carburetor:
Type
×
quantity:
VM12SC x 1
Spark plug (s):
Manufacturer/model:
PW50


NGK/BPR4HS
PW50Z NGK/BPR4HS



DENSO/W14FPL
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Wet, centrifugal automatic
Transmission:
Primary reduction system:
Spur gear
Primary reduction ratio:
63/33 (1.909)
Secondary reduction system:
Shaft drive
Secondary reduction ratio:
19/15
×
54/11 (6.218)
Chassis:
Frame type:
Steel tube backbone
Caster angle:
25.50 °
Trail:
50.0 mm (1.97 in)
Front tire:
Type:
With tube
Size:
2.50-10 4PR

INDEX
A
Acceleration and deceleration ................... 6-2
Air filter element, cleaning ......................... 7-8
Autolube pump, adjusting ........................ 7-16
B
Brake lever, front ....................................... 4-2
Brake lever, rear ........................................ 4-3
Brake levers, lubricating .......................... 7-16
Brake shoes, checking ............................ 7-14
Braking ...................................................... 6-2
C
Cables, checking and lubricating ............. 7-15
Carburetor, adjusting ............................... 7-10
Care ........................................................... 8-1
Centerstand, checking and lubricating .... 7-16
E
Engine break-in ......................................... 6-3
Engine idling speed ................................. 7-10
Engine oil ................................................... 4-5
Engine, starting a warm ............................. 6-1
Engine stop switch..................................... 4-1
F
Front and rear brake lever free play,
adjusting ................................................ 7-13
Front fork, checking ................................. 7-17
Fuel............................................................ 4-3
Fuel cock ................................................... 4-6
Fuel tank breather hose............................. 4-5
Fuel tank cap ............................................. 4-3
H
Handlebar switch ....................................... 4-1
I
Identification numbers ............................. 10-1
K
Kickstarter ................................................. 4-7
L
Labels, location ......................................... 1-1
M
Maintenance and lubrication, periodic ....... 7-3
Maintenance, emission control system ..... 7-2
Matte color, caution ................................... 8-1
Middle and final gear cases....................... 7-8
Model label .............................................. 10-1
P
Parking ...................................................... 6-4
Part locations............................................. 3-1
Power reduction plate, removing ............... 7-6
S
Safety information ..................................... 2-1
Seat ........................................................... 4-7
Spark arrester, cleaning ............................ 7-9
Spark plug, checking ................................. 7-5
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 ................................... 7-17
Storage ...................................................... 8-3
T
Throttle cable free play, checking............ 7-11
Throttle grip and cable, checking and
lubricating.............................................. 7-15
Tires ........................................................ 7-11
Tool kit ....................................................... 7-1
Transmission oil ........................................ 7-7Troubleshooting ...................................... 7-22
Troubleshooting chart ............................. 7-24
V
Vehicle Emission Control
Information label (For Canada) ............. 10-2
Vehicle identification number .................. 10-1
W
Wheel bearings, checking ....................... 7-18
Wheel (front) ........................................... 7-18
Wheel (rear) ............................................ 7-20
Wheels .................................................... 7-13