General Specifications - Yamaha YB50 Service Manual

Engine:
Engine type
Arrangement of cylinders
Cylinder capacity
Diameter and stroke
Compression ratio
Starter system
Lubrication system:
Type or grade of oil:
Engine oil
Transmission oil
Oil capacity:
Oil sump (engine oil)
Transmission oil
Periodic change of oil
Total quantity
Air filter:
Fuel:
Type
Fuel tank capacity
Carburettor:
Type/Manufacturer
Spark plug:
Type/Manufacturer
Distance between electrodes
Clutch type:
Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Type of transmission
Action
Chassis:
Frame
Inclination angle of front axle
Trail
Tyres:
Size (FR)
Size (R)
Tyre pressures (cold):

GENERAL SPECIFICATIONS

Model
(Front)
(Rear)
Reed valve, petrol, 2-stroke, air-cooled
One cylinder inclined to the front
49.2 cc
40.0 x 39.2 mm
11.6:1 5AD
Electrical and pedal kickstart
Yamaha autolubrication
2-stroke air-cooled engine oil
SE type 10W30 SAE engine oil
1.2 L
0.10 L
0.11 L
Flue type
Unleaded petrol
6.5 L
PHVA/DELLORTO/PY12,1/GURTNER
5AD y SA15
BR8HS/N.G.K.
0.6 ~ 0,7 mm
Dry, automatic centrifugal
Helicoidal gearing
52/13 (4.00)
Straight gearing
42/13(3.230) 5AD-SA15 45/12(33.750) SA19
Automatic one speed
(Trapezoidal belt type)
Automatic centrifuge type
Steel underside of pipe
26,5°
92.5 mm
120/70-12
130/70-12
1.75 kg/cm
2.00 kg/cm
2-1
SPEC
YN50R
10.2:1 SA15 11:1 SA19
SA19
BPR4HS/NGK
0.6 ~ 0.7 mm
2
2