2011 YAMAHA PW50 stop start

DESCRIPTION
3-1
3
EAU10410
Left view
1
2
3
45
6
1. Spark plug (page 7-6)
2. Fuel cock (page 4-6)
3. Throttle stop screw (page 7-11)
4. Air filter element (page 7-9)
5. Kickstarter (page 4-7)
6. Centerstand (page 7-17)U5PG8AE0.book Page 1 Thursday, April 8, 2010 8:37 AM

DESCRIPTION
3-3
3
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. Engine stop switch (page 4-1)
5. Front brake lever (page 4-2)
6. Throttle grip (page 7-12)
7. Fuel tank cap (page 4-3)U5PG8AE0.book Page 3 Thursday, April 8, 2010 8:37 AM

INSTRUMENT AND CONTROL FUNCTIONS
4-1
4
EAU40660
Handlebar switch
EAU40674
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.TIP

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 motorcycle
cannot be ridden in that switch po-
sition.
EAU41043
Speed limiter and power re-
duction plate Your motorcycle is equipped 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 learning.
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
U5PG8AE0.book Page 1 Thursday, April 8, 2010 8:37 AM

INSTRUMENT AND CONTROL FUNCTIONS
4-6
4
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.O (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).
1. Arrow mark pointing to “S” (stop)
1
1. Arrow mark pointing to “O” (on)
1
1. Starter (choke) lever“”
1 (a)
(b)
U5PG8AE0.book Page 6 Thursday, April 8, 2010 8:37 AM

OPERATION AND IMPORTANT RIDING POINTS
6-1
6
EAU15951
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10271
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accident
or injury.
EAU40888
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 4-6.)
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.
NOTICE: For maximum engine
life, never accelerate hard when
the engine is cold!
[ECA11041]
6. When the engine is warm, turn the
starter (choke) off and set the en-
gine stop switch to “RUN”.TIPThe engine is warm when it responds
quickly 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.TIPIf the engine does not start after several
kicks, try again with the throttle 1/4 to
1/2 open.
U5PG8AE0.book Page 1 Thursday, April 8, 2010 8:37 AM

OPERATION AND IMPORTANT RIDING POINTS
6-2
6
EAU41002
Starting off 1. While applying the rear brake le-
ver, push the motorcycle off the
centerstand.
2. Completely close the throttle.
3. Set the engine stop switch to
“RUN”.
4. Check for oncoming off-road vehi-
cles, and then slowly turn the throt-
tle grip in order to take off.
EAU16780
Acceleration and deceleration The speed can be adjusted by opening
and closing the throttle. To increase the
speed, turn the throttle grip in direction
(a). To reduce the speed, turn the throt-
tle grip in direction (b).
EAU41012
Braking
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.
1. Close the throttle completely.
2. Apply both front and rear brakes
simultaneously while gradually in-
creasing the pressure.
Front
(a)(b)
U5PG8AE0.book Page 2 Thursday, April 8, 2010 8:37 AM

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)
U5PG8AE0.book Page 11 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.
U5PG8AE0.book Page 4 Thursday, April 8, 2010 8:37 AM