Yamaha why YH50 Owner's Manual page 68

SPECIFICATIONS
Specifications
Model
Dimensions:
Overall length
Overall width
Overall height
Seat height
Wheelbase
Minimum ground clearance
Minimum turning radius
Weight:
Wet (with oil and a full fuel tank)
Engine:
Engine type
Cylinder arrangement
Displacement
Bore x stroke
Compression ratio
8 Starting system type
Lubrication system
Engine oil:
Type
Classification
Capacity
YH50
1.940 mm
685 mm
1.105 mm
765 mm
1.294 mm
125 mm
1.800 mm
78 kg
Air cooled, 2 strokes
Single cylinder, horizontal
49.2 cm3
40.0 x 39.2
7.25:1
Electric and kick starter
Separate lubrication
(Autolube)
Yamalube 2
or 2 strokes engine oil
Jaso FC ou ISO EG-C, EG-D
1.3 L
Transmission oil:
Type
Capacity
Périodic oil change
Total amount
Air filter type:
Fuel:
Recommended fuel
Fuel tank capacity
Carburetor:
Type / quantity
Manufacturer
Spark plug:
Type / Manufacturer
Spark plug gap
Clutch type:
Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
Operation
8-1
SAE 10W30 type SE
0.11L
0.13L
Wet type element
Regular unleaded gasoline
(RON 91 mini)
7L
PY-12
GURTNER
BR8HS / NGK
0.6—0.7 mm
Dry, centrifugal automatic
Helical gear
52/13 (4.000)
Spur gear
45/12 (3.750)
V-belt automatic
Centrifugal automatic type