Page 10 of 80

GIVE SAFETY THE RIGHT OF WAY
1Scooters are fascinating vehicles, which can give you an unsurpassed feeling of power and freedom. However,
they also impose certain limits, which you must accept; even the best scooter does not ignore the laws of
physics.
Regular care and maintenance are essential for preserving value and operating condition of your scooter.
Moreover, what is true for the scooter is also true for the rider: good performance depends on being in good
shape. Riding under the influence of medication, drugs and alcohol is, of course, out of the question. Scooter
riders — more than car drivers — must always be at their mental and physical best. Under the influence of
even small amounts of alcohol, there is a tendency to take dangerous risks.
Protective clothing is as essential for the scooter rider as seat belts are for car drivers and passengers.
Always wear a complete scooter suit (whether made of leather or tear-resistant synthetic materials with
protectors), sturdy boots, scooter gloves and a properly fitting helmet. Optimum protective wear, however,
should not encourage carelessness. Although full-coverage helmets and suits, in particular, create an illu-
sion of total safety and protection, motorcyclists will always be vulnerable. Riders who lack critical self-
control run the risk of going too fast and are apt to take chances. This is even more dangerous in wet
weather. The good motorcyclist rides safely, predictably and defensively — avoiding all dangers, including
those caused by others.
Enjoy your ride!
1-1
Page 40 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
6
6-3 •Check tread depth and for damage.
9 * Tires•Replace if necessary.
•Check air pressure.√√√√ √
•Correct if necessary.
10 * Wheel bearings•Check bearing for looseness or damage.√√√√11 * Steering bearings•Check bearing play and steering for roughness.√√√√√
•Lubricate with lithium-soap-based grease.Every 24,000 km
12 * Chassis fasteners•Make sure that all nuts, bolts and screws
√√√√ √are properly tightened.
13 Centerstand•Check operation.
√√√√ √•Lubricate.
14 * Front fork•Check operation and for oil leakage.√√√√
15 * Rear shock absorber
•Check operation and shock absorber for oil leakage.√√√√
assembly
16 * Carburetor•Adjust engine idling speed.√√√√√ √
17 * Autolube pump•Check operation.
√√√√
•Bleed if necessary.
18 Final transmission oil•Check vehicle for oil leakage.√√ √
•Change.√√√
19 * V-belt•Replace.Every 10,000 kmNO. Item
Check or maintenance job
ODOMETER READING (x 1,000 km)1ANNUAL
CHECK
6121824
Page 68 of 80

SPECIFICATIONS
8
8-1 Model EW50
Dimensions:
Overall length 1,785 mm
Overall width 668 mm
Overall height 1,077 mm
Seat height 787 mm
Wheelbase 1,202 mm
Minimum ground clearance 185 mm
Minimum turning radius 1,800 mm
Weight:
Wet (with oil and a full fuel tank) 81 kg
Engine:
Engine type Air cooled, 2strokes
Cylinder arrangement Single cylinder, vertical
Displacement 49.2 cc
Bore x stroke 40.0 x 39.2 mm
Compression ratio 11.2:1
Starting system type Electric and kick starter
Lubrication system Separate lubrication
(Autolube)
Engine oil:
Type Yamalube 2
or 2 strokes engine oil
Classification Jaso FC or ISO EG-C, EG-D
Capacity 1.3 LFinal transmission oil:
Type SAE 10W30 type SE
Capacity 0.11L
Air filter type:Wet type element
Fuel:
Recommended fuel Regular unleaded gasoline
(RON 91 mini)
Fuel tank capacity 6.5 L
Carburetor:
Type/quantity TK ø12
Manufacturer TEIKEI
Spark plug:
Type / Manufacturer BR8HS / NGK or BR9HS/NGK
Spark plug gap 0.5—0.7 mm
Clutch type:Dry, centrifugal automatic
Transmission:
Primary reduction system Helical gear
Primary reduction ratio 52/13 (4.000)
Secondary reduction system Spur gear
Secondary reduction ratio 42/13 (3.230)
Transmission type V-belt automatic
Operation Centrifugal automatic type
Chassis:
Frame type Steel tube underbone
Caster angle 27°
Trail 90 mm
Specifications
Page 75 of 80
CONSUMER INFORMATION
9
1
ZAUM01661. Model label
EAU01278
Model labelThe model label is affixed to the bottom
of the seat. (See page 3-8 for seat
opening procedures.) Record the infor-
mation on this label in the space
provided. This information will be
needed when ordering spare parts from
a Yamaha dealer.
9-2