YAMAHA PW50 2007 Owner's Manual

DESCRIPTION
2-2
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EAU10420
Right view
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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
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EAU10430
Controls and instruments
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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)

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INSTRUMENT AND CONTROL FUNCTIONS
EAU40660
Handlebar switch
EAU40673
Engine stop switch “OFF/RUN/
START”
Set this switch to “START” before start-
ing the engine. Set this switch to “RUN”
after warming up the engine or before
starting off. Set this switch to “OFF” to
stop the engine.
NOTE:


The engine cannot be started with
this switch set to the “RUN” posi-
tion.

The engine speed is limited while
this switch is set to the “START”
position, therefore the motorcyclecannot be ridden in that switch po-
sition.
EAU41041
Speed limiter and power
reduction plate
Your motorcycle was delivered with an
adjustable speed limiter and a power
reduction plate. The speed limiter
keeps the throttle from fully opening,
even when the throttle grip is turned to
the maximum. The power reduction
plate is installed in the exhaust mani-
fold to limit the amount of power avail-
able while they learn.
Speed limiter
1. Loosen the locknut.
2. To increase the maximum engine
power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (a). To
decrease the maximum engine
power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (b).
1. Engine stop switch “OFF/RUN/START”
1

INSTRUMENT AND CONTROL FUNCTIONS
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3. Tighten the locknut.
NOTE:

The adjusting range of the speed limiter
screw is from the fully turned-in position
to 7 mm (0.28 in) turned out. When thescrew is turned out to 7 mm (0.28 in),
the throttle grip can only be opened ap-
proximately halfway. If more power is
required, please consult a Yamaha
dealer.
WARNING

EWA14630
Improper adjustment of the speed
limiter could cause improper throttle
operation. You could lose control,
have an accident or be injured. Do
not turn the adjusting screw out
more than 7 mm (0.28 in) before con-
sulting a Yamaha dealer. Always
make sure the throttle cable free
play is adjusted to 1.5–3.5 mm
(0.06–0.14 in). (See page 6-11.)
Power reduction plate
Once the rider can operate with skill at
the top speed permitted by adjusting
the speed limiter alone, the power re-
duction plate can be removed. (See
page 6-6.)
EAU12900
Front brake lever
The front brake lever is located on the
right handlebar grip. To apply the front
brake, pull this lever toward the handle-
bar grip.
1. Locknut
2. Adjusting screw
1. No more than 7 mm (0.28 in)
1
(a)(b)2
1

1. Front brake lever
1

INSTRUMENT AND CONTROL FUNCTIONS
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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
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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
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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
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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

INSTRUMENT AND CONTROL FUNCTIONS
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EAU40920
Seat
To remove the seat
1. Remove the mudguard by remov-
ing the bolts and washers.
2. Pull the seat off.
To install the seat
1. Insert the projection on the front of
the seat into the seat holder as
shown.2. Place the seat in the original posi-
tion.
3. Install the mudguard by installing
the washers and bolts.
NOTE:

Make sure that the seat is properly se-
cured before riding.
1. Bolt
2. Mudguard
1
2

1. Seat holder
2. Projection
1
2

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PRE-OPERATION CHECKS
EAU15591
The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or loss
of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual inspec-
tion, to check the following points before each ride.
NOTE:

Pre-operation checks should be made each time the vehicle is used. Such an inspection can be accomplished in a very short
time; and the added safety it assures is more than worth the time involved.
WARNING

EWA11150
If any item in the Pre-operation check list is not working properly, have it inspected and repaired before operating
the vehicle.