2011 YAMAHA PW50 maintenance

PERIODIC MAINTENANCE AND ADJUSTMENT
7-19
73. Remove the axle nut and washer.
4. Pull the wheel axle out, and then
remove the wheel.
EAU41031
To install the front wheel
1. Install the brake shoe plate into the
wheel hub as shown.
2. Lift the wheel up between the fork
legs.TIPMake sure that the slot in the brake
shoe plate fits over the retainer on the
fork leg.
3. Insert the wheel axle from the right
side.
4. Install the washer and axle nut,
and then tighten the axle nut to the
specified torque.
5. Connect the brake cable at the
wheel hub, and then install the
brake cable free play adjusting nut.
6. Adjust the brake lever free play.
(See page 7-14.)
7. Take the motorcycle off the center-
stand so that the front wheel is on
the ground.
1. Brake camshaft lever
2. Brake shoe plate
3. Washer
4. Axle nut
5. Brake cable
6. Brake lever free play adjusting nut
1. Wheel axle
5
6 13
4
2
1
1. RetainerTightening torque:
Axle nut:
40 Nm (4.0 m·kgf, 29 ft·lbf)
1
U5PG8AE0.book Page 19 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-20
7 8. Push down hard on the handlebar
several times to check for proper
fork operation.
EAU25080
Rear wheel
EAU41084
To remove the rear wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Place the motorcycle on the cen-
terstand.
2. Remove the seat. (See page 4-7.)
3. Remove the muffler bolt and wash-
ers. WARNING! Always let the
exhaust system cool prior to
touching exhaust components.
[EWA14581]
4. Slide the spring clamp down, and
then remove the muffler.5. Remove the exhaust chamber bolt
and washers.
1. Muffler
2. Washer
3. Muffler bolt
4. Spring clamp
1. Exhaust chamber
2. Exhaust chamber bolt
3. Washer
3
1
24
2 1
3
U5PG8AE0.book Page 20 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-21
76. Remove the exhaust manifold
bolts, and then remove the ex-
haust chamber, the power reduc-
tion plate and the gasket.
7. Remove the right-side rear shock
absorber mounting bolt and then
tilt the rear shock absorber upward
as shown.8. Remove the axle nut while apply-
ing the rear brake.
9. Remove the rear arm by removing
the nuts and washers.10. Pull the wheel to the right to sepa-
rate it from the final gear case, and
then remove the wheel.
EAU41522
To install the rear wheel
1. Apply a light coating of lithium-
soap-based grease to the splines
of the final gear case and wheel
hub.
2. Install the wheel by inserting it into
the wheel hub.
3. Install the rear arm by installing the
washers and nuts.
4. Install the axle nut.
1. Exhaust manifold bolt
1
1. Rear shock absorber mounting bolt
1. Axle nut
1
1
1. Rear arm
2. Washer
3. Rear arm nut
1
2
3
U5PG8AE0.book Page 21 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-22
7 5. Install the right-side rear shock ab-
sorber by installing the mounting
bolt.
6. While applying the rear brake,
tighten the axle nut to the specified
torque.
7. Tighten the rear arm nuts and rear
shock absorber mounting bolt to
the specified torques.
8. Install the exhaust chamber by in-
stalling the bolt and washers.
9. Install the power reduction plate, a
new gasket, and then install the
exhaust manifold bolts.
10. Tighten the exhaust manifold bolts
and exhaust chamber bolt to the
specified torques.11. Install the muffler by sliding the
spring clamp up to its original posi-
tion, and then installing the wash-
ers and muffler bolt.
TIPMake sure that the spring clamp is po-
sitioned with the projection side facing
inward.12. Tighten the muffler bolt to the
specified torque.13. Adjust the brake lever free play.
(See page 7-14.)
14. Install the seat.
Tightening torques:
Axle nut:
60 Nm (6.0 m·kgf, 43 ft·lbf)
Rear arm nut:
29 Nm (2.9 m·kgf, 21 ft·lbf)
Rear shock absorber mounting bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
Tightening torques:
Exhaust manifold bolt:
9 Nm (0.9 m·kgf, 6.5 ft·lbf)
Exhaust chamber bolt:
18 Nm (1.8 m·kgf, 13 ft·lbf)
1. Exhaust chamber
2. Spring clamp
3. Muffler
1
2
3
Tightening torque:
Muffler bolt:
18 Nm (1.8 m·kgf, 13 ft·lbf)
U5PG8AE0.book Page 22 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-23
7
EAU25851
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING
EWA15141
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from waterheaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.U5PG8AE0.book Page 23 Thursday, April 8, 2010 8:37 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-24
7
EAU25972
Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is
enough fuel.
There is
no fuel.
Supply fuel.
Operate the kickstarter.2. Compression
There is compression.
There is
no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wet
DryWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.The engine does not start.
Have a Yamaha dealer check the vehicle.
Open the throttle halfway and operate
the kickstarter.
Check the compression.
The engine does not start.
Check the compression.
U5PG8AE0.book Page 24 Thursday, April 8, 2010 8:37 AM

INDEXAAcceleration and deceleration................. 6-2
Air filter element, cleaning....................... 7-9
Autolube pump, adjusting ..................... 7-16BBrake lever, front..................................... 4-2
Brake lever, rear ..................................... 4-3
Brake levers, lubricating........................ 7-16
Brake shoes, checking .......................... 7-15
Braking .................................................... 6-2CCables, checking and lubricating .......... 7-15
Carburetor, adjusting ............................ 7-11
Care ........................................................ 8-1
Centerstand, checking and
lubricating ........................................... 7-17EEngine break-in ....................................... 6-3
Engine idling speed............................... 7-11
Engine oil ................................................ 4-5
Engine, starting a warm .......................... 6-1
Engine stop switch .................................. 4-1FFront and rear brake lever free play,
adjusting ............................................. 7-14
Front fork, checking .............................. 7-17
Fuel ......................................................... 4-3
Fuel cock................................................. 4-6
Fuel tank breather hose .......................... 4-5
Fuel tank cap .......................................... 4-3HHandlebar switch .................................... 4-1IIdentification numbers ........................... 10-1
KKickstarter............................................... 4-7LLabels, location....................................... 1-1MMaintenance and lubrication, periodic .... 7-4
Maintenance, emission control system... 7-3
Matte color, caution ................................ 8-1
Middle and final gear cases .................... 7-9
Model label ........................................... 10-1PParking ................................................... 6-4
Part locations .......................................... 3-1
Power reduction plate, removing ............ 7-7SSafety information................................... 2-1
Seat ........................................................ 4-7
Spark arrester, cleaning ....................... 7-10
Spark plug, checking .............................. 7-6
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 ................................ 7-18
Storage ................................................... 8-3TThrottle cable free play, checking ......... 7-12
Throttle grip and cable, checking and
lubricating ........................................... 7-16
Tires...................................................... 7-12
Tool kit .................................................... 7-2Transmission oil ...................................... 7-8
Troubleshooting .................................... 7-23
Troubleshooting chart ........................... 7-24
VVehicle Emission Control Information
label (For Canada) .............................. 10-2
Vehicle identification number ................ 10-1WWheel bearings, checking ..................... 7-18
Wheel (front) ......................................... 7-18
Wheel (rear) .......................................... 7-20
Wheels .................................................. 7-13
U5PG8AE0.book Page 1 Thursday, April 8, 2010 8:37 AM