fuel YAMAHA PW50 2007 Owners Manual

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
Care ................................................ 7-1
Storage ........................................... 7-3
SPECIFICATIONS
............................. 8-1

SAFETY INFORMATION
1-3
1
engine power.
Gasoline and exhaust gas

GASOLINE IS HIGHLY FLAMMA-
BLE:

Always turn the engine off when
refueling.

Take care not to spill any gaso-
line on the engine or exhaust
pipe/muffler when refueling.

Never refuel while smoking or in
the vicinity of an open flame.

Never start the engine or let it run
for any length of time in a closed
area. The exhaust fumes are poi-
sonous and may cause loss of
consciousness and death within a
short time. Always operate your
motorcycle in an area that has ad-
equate ventilation.

Always turn the engine off before
leaving the motorcycle unattend-
ed. When parking the motorcycle,
note the following:

The engine and exhaust pipe/
muffler may be hot, therefore,
park the motorcycle in a place
where pedestrians or childrenare not likely to touch these hot
areas.

Do not park the motorcycle on a
slope or soft ground, otherwise it
may fall over.

Do not park the motorcycle near
a flammable source (e.g., a ker-
osene heater, or near an open
flame), otherwise it could catch
fire.

When transporting the motorcycle
in another vehicle, make sure that
it is kept upright and that the fuel
cock is turned to “S” (stop). If the
motorcycle should lean over, gas-
oline may leak out of the carbure-
tor or fuel tank.

If you should swallow any gaso-
line, inhale a lot of gasoline vapor,
or allow gasoline to get into your
eyes, see your doctor immediate-
ly. If any gasoline spills on your
skin or clothing, immediately wash
the affected area with soap and
water and change your clothes.

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

DESCRIPTION
EAU10410
Left view
123
4 5

1. Fuel cock (page 3-5)
2. Throttle stop screw (page 6-10)
3. Air filter element (page 6-8)
4. Kickstarter (page 3-6)
5. Centerstand (page 6-17)

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
3-3
2
34
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.
EAU13180
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

EWA11090
Make sure that the fuel tank cap is
properly closed before riding.
EAU13220
Fuel
Make sure that there is sufficient fuel in
the tank. When refueling, be sure to in-
sert the pump nozzle into the fuel tank
filler hole and to fill the tank to the bot-
tom of the filler tube as shown.
WARNING

EWA10880

Do not overfill the fuel tank, oth-
erwise it may overflow when the
fuel warms up and expands.

Avoid spilling fuel on the hot en-
gine.
1. Rear brake lever
1

1. Fuel tank cap
1

1. Fuel tank filler tube
2. Fuel level
2 1

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

ECA10070
Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfac-
es or plastic parts.
EAU41980
For Canada
CAUTION:

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. Ifknocking (or pinging) occurs, use a
gasoline 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%. Gasohol con-
taining methanol is not recommended
by Yamaha because it can cause dam-
age to the fuel system or vehicle perfor-
mance problems.
Except for Canada
CAUTION:

ECA15590
Use only unleaded gasoline. The use
of leaded gasoline will cause severedamage 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 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.
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
3-5
2
34
5
6
7
8
9

EAU13411
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 end of 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

INSTRUMENT AND CONTROL FUNCTIONS
3-6
1
2
3
4
5
6
7
8
9O (on)
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.

EAU13590
Starter (choke) lever “”
Starting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the lever in direction (a) to turn on
the starter (choke).
Move the lever in direction (b) to turn off
the starter (choke).
EAU13680
Kickstarter
To start the engine, fold out the kick-
starter lever, move it down lightly with
your foot until the gears engage, and
then push it down smoothly but force-
fully.
1. Arrow mark pointing to “O” (on)
1

1. Starter (choke) lever “”
1 (a)
(b)

1. Kickstarter
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

5-1
2
3
4
56
7
8
9

OPERATION AND IMPORTANT RIDING POINTS
EAU40771
WARNING

EWA14531

This model is designed for
off-road use only. Become thor-
oughly familiar with all operat-
ing controls and their functions
before riding. Consult a Yamaha
dealer regarding any control or
function that you do not thor-
oughly understand.

Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.
EAU40882
Starting and warming up a
cold engine
1. Turn the fuel cock lever to “O” (on).
2. Set the engine stop switch to
“START”.
3. Turn the starter (choke) on and
completely close the throttle. (See
page 3-6.)
4. While applying the front or rear
brake, start the engine by pushing
the kickstarter lever down.
5. After starting the engine, move the
starter (choke) back halfway.
CAUTION:

ECA11130
For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when the
engine is cold!
6. When the engine is warm, turn the
starter (choke) off and set the en-
gine stop switch to “RUN”.
NOTE:

The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off.
EAU16660
Starting a warm engine
Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm. Instead, start
the engine with the throttle slightly
open.
NOTE:

If the engine does not start after sever-
al kicks, try again with the throttle 1/4
to 1/2 open.