Page 31 of 80
Instrument and control functions
4-6
4
EAU13414
Fuel tank breather hose
Before operating the motorcycle:
Check the fuel tank breather hose
connection.
Check the fuel tank breather hose
for cracks or damage, and replace
it if necessary.
Make sure that the fuel tank
breather hose is not blocked, and
clean it if necessary.
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.
1. Fuel tank breather hose
1
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
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Page 36 of 80

For your safety – pre-operation checks
5-1
5
EAU63440
Inspect your vehicle each time you use it to make sure the vehicle is in safe oper-
ating condition. Always follow the inspection and maintenance procedures and
schedules described in the Owner’s Manual.
WARNING
EWA11152
Failure to inspect or maintain the vehicle properly increases the possibility
of an acci dent or equipment d amage. Do not operate the vehicle if you fin d
any pro blem. If a pro blem cannot be correcte d b y the proce dures provi ded
in this manual, have the vehicle inspecte d b y a Yamaha dealer.
Before using this vehicle, check the following points:
ITEM CHECKSPAGE
Fuel • Check fuel level in fuel tank.
• Refuel if necessary.
• Check fuel line for leakage.
• Check fuel tank breather hose for obstructions, cracks
or damage, and check hose connection. 4-4, 4-6
2-stroke en gine oil • Check oil level in oil tank.
• If necessary, add recommended oil to specified level.
• Check vehicle for oil leakage. 4-6
Transmission oil • Check oil level in transmission case.
• If necessary, add recommended oil to specified level. 7-8
Mi dd le an d final g ear
cases • Check vehicle for grease leakage.
7-9
Front brake • Check operation.
• Lubricate cable if necessary.
• Check lever free play.
• Adjust if necessary. 7-16,
7-17
Rear brake • Check operation.
• Lubricate cable if necessary.
• Check lever free play.
• Adjust if necessary. 7-16,
7-17
Throttle grip • Make sure that operation is smooth.
• Check throttle grip free play.
• If necessary, have Yamaha dealer adjust throttle grip
free play and lubricate cable and grip housing. 7-13,
7-19
Control ca bles • Make sure that operation is smooth.
• Lubricate if necessary.
7-18
Wheels an d tires •Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary. 7-14,
7-16
Brake levers • Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.
7-20
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Page 50 of 80

Periodic maintenance an d a djustment
7-9
7 4. Install the transmission oil drain
bolt and its new gasket, and then
tighten the bolt to the specified
torque.
5. Refill with the specified amount of the recommended transmission
oil, and then install and tighten the
oil filler cap.
NOTICE
ECA10453
In or der to prevent clutch slip-
pa ge (since the transmission oil
also lu bricates the clutch), d o
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
hi gher quality than specifie d. In
a ddition, do not use oils la bele d
“ENERGY CONSERVING II” or
hi gher.
Make sure that no forei gn mate-
rial enters the transmission.
6. 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 cau-
se.
EAU41712
Middle an d final g ear cases
The middle and final gear cases must
be checked for grease leakage before
each ride. If any leakage is found, have
a Yamaha dealer check and repair the
motorcycle. In addition, have a
Yamaha dealer check and lubricate the middle and final gears at the intervals
specified in the periodic maintenance
and lubrication chart.
Ti ghtenin g torque:
Transmission oil drain bolt: 14 Nm (1.4 m·kgf, 10 ft·lbf)
Recommen ded transmission oil:
See page 9-1.
Oil chan ge quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
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Page 51 of 80

Periodic maintenance an d a djustment
7-10
7
EAU40904
Cleanin g the air filter element
The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean or, if necessary, replace the air
filter element more frequently if you are
riding in unusually wet or dusty areas.
1. Remove the seat. (See page 4-8.)
2. Remove the air filter case cover by removing the screw.
3. Pull the sponge material out, clean it with solvent, and then squeeze
the remaining solvent out. 4. Apply oil of the recommended
type to the entire surface of the
sponge material, and then
squeeze the excess oil out.
TIP
The sponge material should be wet but
not dripping.
5. Insert the sponge material into theair filter case. NOTICE: Make
sure that the spon ge material is
properly seated in the air filter
case. The en gine shoul d never
b e operated without the spon ge
material installe d, otherwise the
piston(s) an d/or cylin der(s) may
b ecome excessively worn.
[ECA15622]
6. Install the air filter case cover by
installing the screw.
7. Install the seat.
1. Air filter case cover
2. Screw
1. Sponge material
2
1
1
Recommen
ded oil:
Yamaha foam air filter oil or other
quality foam air filter oil
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Page 73 of 80

Specifications
9-1
9
Dimensions:
Overall length:1245 mm (49.0 in)
Overall width:
575 mm (22.6 in)
Overall height: 715 mm (28.1 in)
Seat height: 485 mm (19.1 in)
Wheelbase:
855 mm (33.7 in)
Ground clearance: 105 mm (4.13 in)
Minimum turning radius: 1.3 m (4.27 ft)
Wei ght:
Curb weight:
39 kg (86 lb)
Technical permissible mass (Maximum load +
Curb weight):
64 kg (141 lb)
Noise an d vi bration level:
Noise level (77/311/EEC):
75.1 dB(A) at 2750 r/min
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/IRL/ITA/NLD/
NOR/POL/PRT/SVK/SVN/SWE)
Uncertainty of measurement:
3.0 dB(A)
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/IRL/ITA/NLD/
NOR/POL/PRT/SVK/SVN/SWE)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s²
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/IRL/ITA/NLD/
NOR/POL/PRT/SVK/SVN/SWE)
Vibration on handlebar (EN1032, ISO5008): Will not exceed 2.5 m/s²
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/IRL/ITA/NLD/
NOR/POL/PRT/SVK/SVN/SWE)
Engine:
Combustion cycle:
2-stroke
Cooling system: Air cooled
Number of cylinders:
Single cylinder Displacement:
49 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)
Compression ratio:
6.0 : 1
Starting system: Kickstarter
Lubrication system: Separate lubrication
Engine oil:
Engine oil:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade or ISO EG-C [or EG-D]
grade)
Recommended brand: YAMALUBE
Engine oil quantity:
Engine oil tank capacity:0.30 L (0.32 US qt, 0.26 Imp.qt)
Transmission oil:
Type: Motor oil SAE 10W-30 type SE or higher or
Gear oil SAE 85W GL-3
Quantity: 0.30 L (0.32 US qt, 0.26 Imp.qt)
Air filter:
Air filter element:
Wet element
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 plu g(s):
Manufacturer/model:
NGK/BP4HS (PW50_ZAF)
NGK/BPR4HS
(PW50_AUT/BEL/CHE/CYP/CZE/DEU/DN
K/ESP/FIN/FRA/GBR/GRC/IRL/ITA/NLD/
NOR/POL/PRT/SVK/SVN/SWE/TUR,
PW50G, PW50G2)
Manufacturer/model:
DENSO/W14FP-L (PW50_ZAF)
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
U2SA82E0.book Page 1 Monday, June 8, 2015 1:09 PM