2019 YAMAHA PW50 fuel cap

Table of contents
Location of important la bels ........... 1-1
Safety information ............................ 2-1
Description ....................................... 3-1
Left view ......................................... 3-1
Right view ....................................... 3-2
Controls and instruments ............... 3-3
Instrument an d control functions ... 4-1
Handlebar switch............................ 4-1
Speed limiter and power reduction
plate ............................................ 4-1
Front brake lever ............................ 4-2
Rear brake lever ............................. 4-3
Fuel tank cap .................................. 4-3
Fuel ................................................. 4-4
Fuel tank breather hose.................. 4-5
2-stroke engine oil .......................... 4-6
Fuel cock ........................................ 4-6
Starter (choke) lever ...................... 4-7
Kickstarter ...................................... 4-7
Seat ................................................ 4-8
Cable lock (for Europe) ................... 4-9
For your safety – pre-operation
checks ............................................... 5-1
Operation an d important ri din g
points ................................................ 6-1
Starting and warming up a cold engine ......................................... 6-1
Starting a warm engine .................. 6-2
Starting off ...................................... 6-2
Acceleration and deceleration ........ 6-3
Braking ........................................... 6-3
Engine break-in .............................. 6-4
Parking ........................................... 6-4
Perio dic maintenance an d
a d justment ........................................ 7-1
Owner’s tool kit .............................. 7-2
Periodic maintenance chart for the emission control system ............. 7-3
General maintenance and
lubrication chart .......................... 7-4 Checking the spark plug ................. 7-6
Removing the power reduction
plate ............................................. 7-7
Transmission oil .............................. 7-8
Middle and final gear cases .......... 7-10
Cleaning the air filter element ....... 7-10
Cleaning the spark arrester ........... 7-11
Adjusting the carburetor ............... 7-12
Adjusting the engine idling speed ......................................... 7-13
Checking the throttle grip free
play ............................................ 7-14
Tires .............................................. 7-14
Panel wheels ................................. 7-16
Adjusting the front and rear brake lever free play ............................ 7-17
Checking the front and rear brake
shoes ......................................... 7-18
Checking and lubricating the cables ........................................ 7-19
Checking and lubricating the throttle grip and cable ............... 7-19
Adjusting the Autolube pump ....... 7-20
Lubricating the front and rear
brake levers ............................... 7-20
Checking and lubricating the
centerstand ................................ 7-21
Checking the front fork ................. 7-21
Checking the steering ................... 7-22
Checking the wheel bearings ........ 7-22
Front wheel ................................... 7-23
Rear wheel .................................... 7-24
Troubleshooting ............................ 7-27
Troubleshooting chart ................... 7-28
Motorcycle care an d stora ge .......... 8-1
Matte color caution ......................... 8-1
Care................................................. 8-1
Storage............................................ 8-3
Specifications ................................... 9-1
Consumer information ................... 10-1
Identification numbers .................. 10-1
In dex ................................................ 11-1
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Safety information
2-4
2
Aftermarket Parts, Accessories, an
d
Mo difications
While you may find aftermarket prod-
ucts similar in design and quality to
genuine Yamaha accessories, recog-
nize that some aftermarket accesso-
ries or modifications are not suitable
because of potential safety hazards to
you or others. Installing aftermarket
products or having other modifications
performed to your vehicle that change
any of the vehicle’s design or operation
characteristics can put you and others
at greater risk of serious injury or
death. You are responsible for injuries
related to changes in the vehicle.
Keep the following guidelines in mind,
as well as those provided under “Load-
ing” when mounting accessories.  Never install accessories that
would impair the performance of
your motorcycle. Carefully inspect
the accessory before using it to
make sure that it does not in any
way reduce ground clearance or
cornering clearance, limit suspen-
sion travel, steering travel or con-
trol operation.
• Accessories fitted to the han- dlebar or the front fork area can
create instability due to improp-
er weight distribution. If acces-
sories are added to the
handlebar or front fork area,
they must be as lightweight as
possible and should be kept to
a minimum.
• Bulky or large accessories may seriously affect the stability of
the motorcycle. Wind may at- tempt to lift the motorcycle, or
the motorcycle may become
unstable in cross winds.
• Certain accessories can dis- place the operator from his or
her normal riding position. This
improper position limits the
freedom of movement of the
operator and may limit control
ability, therefore, such accesso-
ries are not recommended.
 Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the motorcycle’s electrical sys-
tem, an electric failure could re-
sult, which could cause a
dangerous loss of lights or engine
power.
Aftermarket Tires an d Rims
The tires and rims that came with your
motorcycle were designed to match
the performance capabilities and to
provide the best combination of han-
dling, braking, and comfort. Other
tires, rims, sizes, and combinations
may not be appropriate. Refer to page
7-14 for tire specifications and more in-
formation on replacing your tires.
Transportin g the Motorcycle
Be sure to observe following instruc-
tions before transporting the motorcy-
cle in another vehicle.  Remove all loose items from the
motorcycle.
 Check that the fuel cock is in the
“S” (stop) position and that there
are no fuel leaks.
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Description
3-2
3
EAU63391
Right view
12345
6
1. Spark arrester (page 7-11)
2. Seat (page 4-8)
3. Transmission oil filler cap (page 7-8)
4. Fuel tank cap (page 4-3)
5. 2-stroke engine oil tank cap (page 4-6)
6. Transmission oil drain bolt (page 7-8)
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Instrument and control functions
4-3
4
EAU12952
Rear brake lever
The rear brake lever is located on the
left side of the handlebar. To apply the
rear brake, pull this lever toward the
handlebar grip.
EAU13183
Fuel tank cap
To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it
clockwise.
WARNING
EWA11092
Make sure that the fuel tank cap is
properly closed after filling fuel.
Leakin g fuel is a fire hazar d.
1. Rear brake lever
1
1. Fuel tank cap
1
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Instrument and control functions
4-4
4
EAU13213
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline an d gasoline vapors are
extremely flammab le. To avoid fires
an d explosions an d to re duce the
risk of injury when refueling , follow
these instructions.
1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. Stop filling when the fuel reaches the
bottom of the filler tube. Because
fuel expands when it heats up,
heat from the engine or the sun
can cause fuel to spill out of the
fuel tank.
3. Wipe up any spilled fuel immedi- ately. NOTICE: Immediately
wipe off spille d fuel with a clean, d
ry, soft cloth, since fuel may
d eteriorate painte d surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel tank cap.
WARNING
EWA15152
Gasoline is poisonous an d can cau-
se injury or death. Han dle gasoline
with care. Never siphon gasoline by
mouth. If you shoul d swallow some
g asoline or inhale a lot of gasoline
vapor, or get some g asoline in your
eyes, see your doctor imme diately. If
g asoline spills on your skin, wash
with soap an d water. If gasoline
spills on your clothin g, chan ge your
clothes.
EAU41987
NOTICE
ECA15591
Use only unlea ded g asoline. The use
of lead ed g asoline will cause severe
d amag e to internal en gine parts,
such as the piston rin gs as well as to
the exhaust system.
 For Canada: Use gasoline with a
pump octane number [(R+M)/2] of
86 or higher (research octane
number of 91 or higher).
 For Oceania and South Africa: Use
gasoline with a research octane
number of 91 or higher.
1. Fuel tank filler tube
2. Maximum fuel level
2
1
Recommen
ded fuel:
REGULAR UNLEADED GASOLINE
ONLY
Fuel tank capacity: 2.0 L (0.5 US gal, 0.4 Imp.gal)
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Instrument and control functions
4-6
4
EAU13454
2-stroke en gine oil
Make sure that there is sufficient 2-
stroke engine oil in the oil tank. Add the
recommended 2-stroke engine oil as
necessary.
NOTICE
ECA16671
Make sure that the 2-stroke en gine
oil tank cap is properly installe d.
EAU40702
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
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 run-
ning.
O (on)
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
1. 2-stroke engine oil tank cap
2. Minimum level mark
Recommen ded oil:
See page 9-1.
Oil quantity: 0.30 L (0.32 US qt, 0.26 Imp.qt)
2 1
1. Arrow mark pointing to “S” (stop)
1. Arrow mark pointing to “O” (on)
1
1
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Specifications
9-2
9
Fuel:
Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity:
2.0 L (0.5 US gal, 0.4 Imp.gal)
Car buretor:
Type × quantity:
VM12SC × 1
Spark plug(s):
Manufacturer/model:
NGK/BP4HS (PW50_ZAF)
NGK/BPR4HS
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/HRV/HUN/IRL
/ITA/NLD/NOR/POL/PRT/SVK/SVN/SWE/
TUR, PW50K, PW50K2)
Manufacturer/model: DENSO/W14FP-L (PW50_ZAF)
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:Wet, centrifugal, shoe
Drivetrain:
Primary reduction ratio:1.909 (63/33)
Final drive: Shaft
Secondary reduction ratio:
6.218 (19/15 x 54/11)
Chassis:
Frame type:Backbone
Caster angle:
25.5 °
Trail: 50 mm (2.0 in)
Front tire:
Type:
With tube
Size: 2.50-10 4PR
Manufacturer/model: BRIDGESTONE/M29
Manufacturer/model:
IRC/Z MARK II (PW50_ZAF, PW50K,
PW50K2)
Speed rating:
100 km/h (62 mph)
Rear tire:
Type:With tube
Size:
2.50-10 4PR
Manufacturer/model: BRIDGESTONE/M29
Manufacturer/model: IRC/Z MARK II (PW50_ZAF, PW50K,
PW50K2)
Speed rating: 100 km/h (62 mph)
Tire air pressure (measure d on col d
tires):
Front:
100 kPa (1.00 kgf/cm², 15 psi)
Rear: 100 kPa (1.00 kgf/cm², 15 psi)
Front wheel:
Wheel type:Panel wheel
Rim size: 10 x 1.50
Rear wheel:
Wheel type:Panel wheel
Rim size: 10 x 1.50
Front brake:
Type:
Mechanical leading trailing drum brake
Rear brake:
Type:
Mechanical leading trailing drum brake
Front suspension:
Type:Telescopic fork
Spring:
Coil spring
Shock absorber: Hydraulic damper
Wheel travel: 60 mm (2.4 in)
Rear suspension:
Type:Unit swing
Spring: Coil spring
Shock absorber:
Hydraulic damper
U2SA85E0.book Page 2 Friday, May 11, 2018 9:07 AM

11-1
11
Index
A
Acceleration and deceleration ................ 6-3
Air filter element, cleaning .................... 7-10
Autolube pump, adjusting..................... 7-20
B
Brake lever, front .................................... 4-2
Brake lever, rear...................................... 4-3
Brake levers, lubricating ....................... 7-20
Brake shoes, checking ......................... 7-18
Braking.................................................... 6-3
C
Cable lock (for Europe) ........................... 4-9
Cables, checking and lubricating ......... 7-19
Carburetor, adjusting ............................ 7-12
Care ........................................................ 8-1
Centerstand, checking and
lubricating ........................................... 7-21
E
Engine break-in....................................... 6-4
Engine idling speed .............................. 7-13
Engine oil ................................................ 4-6
Engine serial number ............................ 10-1
Engine, starting a warm .......................... 6-2
Engine stop switch ................................. 4-1
F
Front and rear brake lever free play, adjusting ............................................. 7-17
Front fork, checking .............................. 7-21
Fuel ......................................................... 4-4
Fuel cock ................................................ 4-6
Fuel tank breather hose .......................... 4-5
Fuel tank cap .......................................... 4-3
H
Handlebar switch .................................... 4-1
I
Identification numbers .......................... 10-1
K
Kickstarter............................................... 4-7
L
Labels, location....................................... 1-1
M
Maintenance and lubrication, periodic ... 7-4
Maintenance, emission control system .................................................. 7-3
Matte color, caution ................................ 8-1
Middle and final gear cases .................. 7-10
P
Parking .................................................... 6-4
Part locations .......................................... 3-1
Power reduction plate, removing............ 7-7
S
Safety information .................................. 2-1
Seat ........................................................ 4-8
Spark arrester, cleaning ....................... 7-11
Spark plug, checking ............................. 7-6
Specifications ......................................... 9-1
Speed limiter and power reduction
plate ..................................................... 4-1
Starter (choke) lever ............................... 4-7
Starting and warming up a cold
engine .................................................. 6-1
Starting off.............................................. 6-2
Steering, checking................................ 7-22
Storage ................................................... 8-3
T
Throttle grip and cable, checking and lubricating .......................................... 7-19
Throttle grip free play, checking........... 7-14
Tires ...................................................... 7-14
Tool kit.................................................... 7-2
Transmission oil ..................................... 7-8
Troubleshooting ................................... 7-27
Troubleshooting chart .......................... 7-28
V
Vehicle Emission Control Information label (For Canada) .............................. 10-1
Vehicle identification number ............... 10-1
W
Wheel bearings, checking .................... 7-22
Wheel (front) ......................................... 7-23
Wheel (rear) .......................................... 7-24
Wheels .................................................. 7-16
U2SA85E0.book Page 1 Friday, May 11, 2018 9:07 AM