2010 YAMAHA PW80 engine

INSTRUMENT AND CONTROL FUNCTIONS
4-5
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tank cap and add the recommend-
ed oil.
3. Install the 2-stroke engine oil tank
cap.
NOTICE

ECA16670
Make sure that the 2-stroke engine
oil tank cap is properly installed.
4. Install the seat.
EAU13561
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it al-
so.
The fuel cock has three positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.
ON
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES

1. 2-stroke engine oil tank
2. 2-stroke engine oil tank cap
Recommended oil:
See page 9-1.
Oil quantity:
0.75 L (0.79 US qt, 0.66 Imp.qt)
1
2

1. Arrow mark positioned over “OFF”
RES
ONFUEL
OFF
1
1. Arrow mark positioned over “ON”
1. Arrow mark positioned over “RES”
ON
FUEL
RES
OFF
1
ON
OFF
ONFUEL RES
1
RES

INSTRUMENT AND CONTROL FUNCTIONS
4-6
1
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This indicates reserve. If you run out of
fuel while riding, move the lever to this
position. Fill the tank at the first oppor-
tunity. Be sure to set the lever back to
“ON” after refueling!

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. Starter (choke) lever “”
1
(a)(b)

1. Kickstarter
1

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FOR YOUR SAFETY – PRE-OPERATION CHECKS
EAU15596
Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
WARNING

EWA11151
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided in
this manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel

Check fuel level in fuel tank.

Refuel if necessary.

Check fuel line for leakage.4-3
2-stroke engine oil

Check oil level in oil tank.

If necessary, add recommended oil to specified level.

Check vehicle for oil leakage.4-4
Transmission oil

Check oil level in transmission case.

If necessary, add recommended oil to specified level.7-7
Front brake

Check operation.

Lubricate cable if necessary.

Check lever free play.

Adjust if necessary.7-13, 7-15
Rear brake

Check operation.

Check pedal free play.

Adjust if necessary.7-14
Throttle grip

Make sure that operation is smooth.

Check cable free play.

If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.7-11, 7-18
Control cables

Make sure that operation is smooth.

Lubricate if necessary.7-18

FOR YOUR SAFETY – PRE-OPERATION CHECKS
5-2
1
2
3
4
5
6
7
8
9

Drive chain

Check chain slack.

Adjust if necessary.

Check chain condition.

Lubricate if necessary.7-16, 7-17
Wheels and tires

Check for damage.

Check tire condition and tread depth.

Check air pressure.

Correct if necessary.7-12, 7-13
Shift pedal

Make sure that operation is smooth.

Correct if necessary.—
Brake pedal

Make sure that operation is smooth.

Lubricate pedal pivoting point if necessary.7-19
Brake lever

Make sure that operation is smooth.

Lubricate lever pivoting point if necessary.7-19
Sidestand

Make sure that operation is smooth.

Lubricate pivot if necessary.7-19
Chassis fasteners

Make sure that all nuts, bolts and screws are properly tightened.

Tighten if necessary.—
Engine stop switch

Check operation.4-1
ITEM CHECKS PAGE

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OPERATION AND IMPORTANT RIDING POINTS
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.
EAU41155
Starting and warming up a
cold engine
1. Turn the fuel cock lever to “ON”.
2. Set the engine stop switch to
“RUN”.
3. Shift the transmission into the neu-
tral position.
WARNING

EWA14410

Be sure to shift the transmis-
sion into neutral before starting
the engine.

Never ride with the sidestand
down.
4. Turn the starter (choke) on and
completely close the throttle. (See
page 4-6.)
5. Start the engine by pushing the
kickstarter lever down.
6. After starting the engine, move the
starter (choke) back halfway.
NOTICE:
For maximum engine
life, never accelerate hard when
the engine is cold!

[ECA11041]

7. When the engine is warm, turn the
starter (choke) off.
TIP

The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off.

OPERATION AND IMPORTANT RIDING POINTS
6-2
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9

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.
TIP

If the engine does not start after sever-
al kicks, try again with the throttle 1/4
to 1/2 open.
EAU39901
Shifting
This motorcycle has a 3-speed trans-
mission with a centrifugal, automatic
clutch. Shifting gears lets you control
the amount of engine power available
for starting off, accelerating, climbing
hills, etc.
The gear positions are shown in the il-
lustration.
TIP

To shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of its
travel.
NOTICE

ECA15441

Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.

Always release the throttle grip
before changing gears to avoid
damaging the engine, transmis-
sion, and drive train, which are
not designed to withstand the
shock of shifting when the throt-
tle grip is open.
EAU39911
To start out and accelerate
1. Close the throttle.
2. Shift into first gear and release the
shift pedal.
NOTICE:
Always
close the throttle before shifting
gears, otherwise damage to the
engine and drive train may re-
sult.

[ECA15461]

1. Shift pedal
2. Neutral position
1
12 3N2

OPERATION AND IMPORTANT RIDING POINTS
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3. Open the throttle gradually.
4. Once the motorcycle has reached
a speed high enough to change
gears, close the throttle.
5. Shift into second gear and release
the shift pedal.
6. Open the throttle gradually.
7. Follow the same procedure when
shifting to the next higher gear.

EAU16710
To decelerate
1. Close the throttle and apply both
the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and
shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
EAU39920
Engine break-in
There is never a more important period
in the life of your engine than the first 5
hours of riding. It is also important to ac-
custom the rider to the motorcycle dur-
ing this time. Please read the following
information carefully.
Since the engine is brand new, do not
put an excessive load on it for the first 5
hours of operation. The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided. However, momentary
full-throttle operation under load (i.e.,
two to three seconds maximum) does
not harm the engine. Each full-throttle
acceleration should be followed with a
substantial rest period for the engine.
To allow the engine to cool down from
the temporary buildup of heat, cruise at
a lower engine speed.
After the first 5 hours of operation, thor-
oughly check the motorcycle for loose
parts, oil leakage and any other prob-
lems. Be sure to inspect and make ad-justments thoroughly, especially cable
and drive chain slack and loose
spokes. In addition, check all fittings
and fasteners for looseness, and tight-
en if necessary.
NOTICE

ECA10270
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.

OPERATION AND IMPORTANT RIDING POINTS
6-4
1
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6
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EAU17191
Parking
When parking, stop the engine, and
then turn the fuel cock lever to “OFF”.
WARNING

EWA10311

Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.

Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.

Do not park near grass or other
flammable materials which
might catch fire.