PERIODIC MAINTENANCE AND ADJUSTMENT
7-13
7
WARNING
EWA10461
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, which
could lead to an accident.After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
WARNING
EWA15541
Have a Yamaha dealer replace
excessively worn tires. Operat-
ing the motorcycle with exces-sively worn tires decreases
riding stability and can lead to
loss of control.
The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-
quality product.
Ride conservatively after
changing a tire since the tire
must seat itself on the rim prop-
erly. Failure to allow proper
seating may cause tire failure,
which may result in damage to
the motorcycle and injury to the
rider.
EAU40781
Panel wheels
WARNING
EWA10610
The wheels on this model are not de-
signed for use with tubeless tires.
Do not attempt to use tubeless tires
on this model.To maximize the performance, durabil-
ity, and safe operation of your motorcy-
cle, note the following points regarding
the specified wheels.
The wheel rims should be checked
for cracks, bends, warpage or
damage before each ride. If any
damage is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair to
the wheel. A deformed or cracked
wheel must be replaced.
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
Front tire:
Size:
2.50-10 4PR
Manufacturer/model:
BRIDGESTONE/KNOBBY
IRC/KNOBBY
Rear tire:
Size:
2.50-10 4PR
Manufacturer/model:
BRIDGESTONE/KNOBBY
IRC/KNOBBY
U5PG8AE0.book Page 13 Thursday, April 8, 2010 8:37 AM
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:
1300 mm (51.2 in)Weight:With oil and fuel:
39 kg (86 lb)Noise and vibration level:Noise level (77/311/EEC):
PW50 75.1 dB(A)@2750 r/min
Vibration on seat (EN1032, ISO5008):
PW50 Will not exceed 0.5 m/s²
Vibration on handlebar (EN1032, ISO5008):
PW50 Will not exceed 2.5 m/s²Engine:Engine type:
Air cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)Compression ratio:
6.00 :1
Starting system:
Kickstarter
Lubrication system:
Separate lubrication (Yamaha autolube)
Engine oil:Type:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade) or (ISO EG-C or EG-D
grade)
Engine oil quantity:
Quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)Transmission oil:Type:
YAMALUBE 4 (10W-40) or SAE 10W-40
Oil change quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
PW50 Regular unleaded gasoline only
PW50A1 Regular unleaded gasoline only
(CAN)
PW50A1 Unleaded gasoline only
(AUS)(NZL)
Fuel tank capacity:
2.0 L (0.53 US gal, 0.44 Imp.gal)Carburetor:Type × quantity:
VM12SC x 1
Spark plug(s):Manufacturer/model:
NGK/BPR4HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, centrifugal automaticTransmission:Primary reduction system:
Spur gear
Primary reduction ratio:
63/33 (1.909)
Secondary reduction system:
Shaft drive
Secondary reduction ratio:
19/15 × 54/11 (6.218)Chassis:Frame type:
Steel tube backbone
Caster angle:
25.50 °
Trail:
50.0 mm (1.97 in)Front tire:Type:
With tube
Size:
2.50-10 4PR
Manufacturer/model:
BRIDGESTONE/KNOBBY
Manufacturer/model:
IRC/KNOBBY
U5PG8AE0.book Page 1 Thursday, April 8, 2010 8:37 AM
SPECIFICATIONS
9-2
9
Rear tire:Type:
With tube
Size:
2.50-10 4PR
Manufacturer/model:
BRIDGESTONE/KNOBBY
Manufacturer/model:
IRC/KNOBBYLoading:Maximum rider weight:
25.0 kg (55 lb)Tire air pressure (measured on cold
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:
10x1.50Rear wheel:Wheel type:
Panel wheel
Rim size:
10x1.50Front brake:Type:
Drum brake
Operation:
Right hand operation
Rear brake:Type:
Drum brake
Operation:
Left hand operationFront suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
60.0 mm (2.36 in)Rear suspension:Type:
Unit swing
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
50.0 mm (1.97 in)Electrical system:Ignition system:
CDI
U5PG8AE0.book Page 2 Thursday, April 8, 2010 8:37 AM
