2010 YAMAHA PW80 engine

7-1
2
3
4
5
6
78
9

PERIODIC MAINTENANCE AND ADJUSTMENT
EAU41951
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
WARNING

EWA10321
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer perform
service.
WARNING

EWA15121
Turn off the engine when performing
maintenance unless otherwise
specified.

A running engine has moving
parts that can catch on body
parts or clothing and electricalparts that can cause shocks or
fires.

Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 2-1 for more in-
formation about carbon monox-
ide.
EAU17311
Owner’s tool kit
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.
TIP

If you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.

PERIODIC MAINTENANCE AND ADJUSTMENT
7-3
2
3
4
5
6
78
9
8*Tires
Check tread depth and for damage.Replace if necessary.Check air pressure.Correct if necessary.
9*Wheel bearingsCheck bearings for smooth operation.Replace if necessary.
10 *Steering bearingsCheck bearing assemblies for looseness.Moderately repack with lithium-soap-based
grease.
11Drive chainCheck chain slack/alignment and condi-
tion.Adjust and lubricate chain with Yamaha
chain and cable lube thoroughly.Every rideRemove and clean.
12 *Chassis fastenersCheck all chassis fitting and fasteners.Replace if necessary.
13
Sidestand pivotCheck operation.Apply lithium-soap-based g
rease lightly.
14 *Front fork
Check operation and for oil leakage.Replace if necessary.
15 *Shock absorber
assemblyCheck operation and for oil leakage.Replace if necessary.
16 *CarburetorCheck engine idling speed and starter
operation.Clean.Replace if necessary. NO. ITEM CHECK OR MAINTENANCE JOBINITIAL THEREAFTER EVERY
10
hours20
hours40
hours80
hours40
hours80
hours160
hours

PERIODIC MAINTENANCE AND ADJUSTMENT
7-4
1
2
3
4
5
6
7
8
9
TIP

The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
17 *Autolube pump
Check operation.Correct if necessary.
18Transmission oilCheck for oil leakage .Correct if necessary.Change (warm engine before draining).
19 *Control cablesApply Yamaha chain and cable lube or
engine oil 10W-30 lightly.
20 *Throttle grip housing
and cableCheck operation and free play.Apply Yamaha chain and cable lube or
engine oil 10W-30 lightly.
21
Brake lever pivot shaftApply lithium-soap-based g
rease lightly.
22Brake pedal pivot
shaft
Apply lithium-soap-based g
rease lightly.
23 *Cylinder head and
exhaust system
Check for leakage.Tighten if necessary.Decarbonize if necessary.
24 *Spark arresterClean. NO. ITEM CHECK OR MAINTENANCE JOBINITIAL THEREAFTER EVERY
10
hours20
hours40
hours80
hours40
hours80
hours160
hours

PERIODIC MAINTENANCE AND ADJUSTMENT
7-5
2
3
4
5
6
78
9

EAU19603
Checking the spark plug
The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
TIP

If the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
2. Check the spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replaceit if necessary.
To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
1. Spark plug cap
1

1. Spark plug wrench
1

Specified spark plug:
PW80


NGK/BPR6HS
PW80Z NGK/BP6HS



DENSO/W20FP
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
1

PERIODIC MAINTENANCE AND ADJUSTMENT
7-6
1
2
3
4
5
6
7
8
9
spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
TIP

If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
4. Install the spark plug cap.
EAU41102
Removing the power
reduction plate
To obtain full engine performance ca-
pability, removing the power reduction
plate is required.
1. Remove the exhaust manifold by
removing the bolts.
WARNING!
Always let the exhaust system
cool prior to touching exhaust
components.
[EWA14581]

2. Remove the gasket.
3. Remove the power reduction
plate.
TIP

Store the power reduction plate with the
Owner’s Manual so that it is readily
available whenever you want to reduce
the engine power.
4. Install the exhaust manifold by in-
stalling the bolts.
Tightening torque:
Spark plug:
25 Nm (2.5 m·kgf, 18.1 ft·lbf)
1. Exhaust manifold bolt
1
1. Exhaust manifold
2. Gasket
3. Power reduction plate
Tightening torque:
Exhaust manifold bolt:
18 Nm (1.8 m·kgf, 13.0 ft·lbf)
2 13

PERIODIC MAINTENANCE AND ADJUSTMENT
7-8
1
2
3
4
5
6
7
8
9
NOTICE

ECA10452

In order to prevent clutch slip-
page (since the transmission oil
also lubricates the clutch), do
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.

Make sure that no foreign mate-
rial enters the transmission.
5. Start the engine, and then let it idle
for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the cause.
EAU41162
Cleaning the air filter element
The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre-
quently if you are riding in unusually
wet or dusty areas.
1. Remove the air filter case cover by
removing the screws.
2. Pull the air filter element out.3. Remove the sponge material from
the air filter case cover, clean it
with solvent, and then squeeze the
remaining solvent out.
Recommended transmission oil:
See page 9-1.
Oil change quantity:
0.65 L (0.69 US qt, 0.57 Imp.qt)
1. Air filter case cover
2. Screw
2
2
1

1. Sponge material
2. Air filter case cover
1
2

PERIODIC MAINTENANCE AND ADJUSTMENT
7-9
2
3
4
5
6
78
9
4. Apply oil of the recommended type
to the entire surface of the sponge
material, and then squeeze the ex-
cess oil out.
TIP

The sponge material should be wet but
not dripping.
5. Install the sponge material onto
the air filter case cover.
6. Insert the air filter element into the
air filter case.
NOTICE:
Make sure
that the air filter element is prop-
erly seated in the air filter case.
The engine should never be op-erated without the air filter ele-
ment installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]

7. Install the air filter case cover by in-
stalling the screws.
EAU41232
Cleaning the spark arrester
The spark arrester should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
WARNING

EWA10980

Always let the exhaust system
cool prior to touching exhaust
components.

Do not start the engine when
cleaning the exhaust system.
1. Remove the tailpipe by removing
the bolt, and then pulling it out of
the muffler.
2. Tap the tailpipe lightly, and then
use a wire brush to remove any
Recommended oil:
Yamaha foam air filter oil or other
quality foam air filter oil
1. Bolt
1

PERIODIC MAINTENANCE AND ADJUSTMENT
7-10
1
2
3
4
5
6
7
8
9
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.
TIP

Make 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. Bolt
Tightening torque:
Tailpipe bolt:
7.5 Nm (0.8 m·kgf, 5.5 ft·lbf)
23
1