2011 YAMAHA PW80 Stop

PERIODIC MAINTENANCE AND ADJUSTMENT
7-11
72. Tap the tailpipe lightly, and then
use a wire brush to remove any
carbon deposits from the spark ar-
rester portion of the tailpipe and in-
side of the tailpipe housing.
3. Insert the tailpipe into the muffler,
and then install and tighten the bolt
to the specified torque.
TIPMake sure to align the bolt hole when
inserting the tailpipe.
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.
EAU21340
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.
The engine should be warm before
making this adjustment.TIP

The engine is warm when it quickly
responds to the throttle.


A diagnostic tachometer is needed
to make this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. 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).
1. Tailpipe
2. Spark arrester
3. BoltTightening torque:
Tailpipe bolt:
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
23
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-12
7
TIPIf the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
EAU21372
Adjusting the throttle cable
free play The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, adjust it as follows.TIPThe engine idling speed must be cor-
rectly adjusted before checking and ad-
justing the throttle cable free play.1. Loosen the locknut.2. To increase the throttle cable free
play, turn the adjusting nut in direc-
tion (a). To decrease the throttle
cable free play, turn the adjusting
nut in direction (b).
3. Tighten the locknut.
1. Throttle stop screwEngine idling speed:
1650–1750 r/min
1
(a) (b)
1. Throttle cable free play
1
1. Locknut
2. Throttle cable free play adjusting nut
1
2
(a)
(b)
U3RV8LE0.book Page 12 Tuesday, April 13, 2010 8:48 AM

INDEX
AAir filter element, cleaning ...................... 7-9
Autolube pump, adjusting ..................... 7-20BBrake lever ............................................. 4-2
Brake lever, checking and lubricating ... 7-20
Brake lever free play, adjusting ............ 7-14
Brake pedal ............................................ 4-2
Brake pedal, checking and
lubricating ........................................... 7-20
Brake pedal free play, adjusting ........... 7-15
Brake shoes, checking ......................... 7-16CCables, checking and lubricating .......... 7-19
Carburetor, adjusting ............................ 7-11
Care ........................................................ 8-1DDrive chain, cleaning and lubricating .... 7-19
Drive chain slack .................................. 7-17EEngine break-in ...................................... 6-3
Engine idling speed .............................. 7-11
Engine oil ................................................ 4-4
Engine, starting a warm .......................... 6-2
Engine stop switch.................................. 4-1FFront fork, checking .............................. 7-21
Fuel......................................................... 4-3
Fuel cock ................................................ 4-5
Fuel tank breather hose.......................... 4-4
Fuel tank cap .......................................... 4-2GGeneral maintenance and lubrication
chart ..................................................... 7-3
HHandlebar switch..................................... 4-1IIdentification numbers ........................... 10-1KKickstarter ............................................... 4-6LLabels, location .......................................1-1MMaintenance, emission control system ... 7-2
Matte color, caution .................................8-1
Model label ............................................ 10-1PParking ....................................................6-4
Part locations .......................................... 3-1
Power reduction plate ............................. 4-1
Power reduction plate, removing............. 7-7SSafety information ...................................2-1
Seat ......................................................... 4-7
Shifting ....................................................6-2
Shift pedal ............................................... 4-1
Shift pedal, checking ............................. 7-16
Shock absorber assembly ....................... 4-7
Sidestand ................................................ 4-8
Sidestand, checking and lubricating...... 7-21
Spark arrester, cleaning ........................ 7-10
Spark plug, checking ...............................7-6
Specifications .......................................... 9-1
Starter (choke) lever................................ 4-6
Starting and warming up a cold engine ... 6-1
Steering, checking.................................7-22
Storage....................................................8-3
Supporting the motorcycle .................... 7-22
TThrottle cable free play, adjusting ......... 7-12
Throttle grip and cable, checking and
lubricating ........................................... 7-19
Tires ...................................................... 7-13
Tool kit .................................................... 7-1
Transmission oil ...................................... 7-8
Troubleshooting .................................... 7-27
Troubleshooting chart ........................... 7-28VVehicle identification number ................ 10-1WWheel bearings, checking..................... 7-22
Wheel (front) ......................................... 7-23
Wheel (rear) .......................................... 7-25
Wheels .................................................. 7-14
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