1. GENERAL INFORMATION
SPECIFICATIONS
- 2 -
Name
DOWNTOWN125i
Model No.
SK25AA
Overall length
2200mm
Overall width
800 mm
Overall height
1410 mm
Wheel base
1542 mm
Engine type
O.H.C.
Displacement
124.8cc
Fuel Used
92# nonleaded gasoline
Front wheel
68
Net weight (kg)
Rear wheel
96
Total
164
Front wheel
70
Gross weight
(kg)
Rear wheel
104
Total
178
Front wheel
120/80-14
Rear wheel
150/70-13
RR Ground clearance
140 mm
Perform- Braking distance (m)
7.9m/30km/h
ance
Min. turning radius
2600mm
Starting system
Starting motor
Type
liquid cooled 4 stroke
Cylinder arrangement
Single cylinder
Combustion chamber type
Semi-sphere
Valve arrangement
O.H.C.4V
Bore x stroke (mm)
54 x 54.5
Compression ratio
11.7:1
Compression pressure
(kg/cm
²
)
15
Max .horsepower (ps/rpm)
15/8750~9000
Max. torque (kg m/rpm)
1.17/8500~8750
Intake
Open
8 °BTDC
Port
(1mm)
Close
31° BTDC
timing Exhaust
Open
32° BTDC
(1mm)
Close
6 °BTDC
Valve
Intake
0.10 mm
clearance
Exhaust
0.10 mm
Idle speed (rpm)
1850rpm
Lubrication type
Forced pressure &
Wet sump
Oil pump type
Inner/outer rotor type
Oil filter type
Full-flow filtration
Oil capacity
1.2 L
Exchanging capacity
1.0 L
Cooling Type
Liquid cooling
Tires
Engine
Lubrication
System
Air cleaner type & No
Paper element, wet
Fuel capacity
12.5 L
Throttle type
Butterfly type
Type
ECU
Spark plug
NGK CR7E
Spark plug gap
0.6
～
0.7mm
Battery
Capacity
12V10AH
Clutch Type
Dry multi-disc clutch
Type
Non-stage transmission
Operation
Automatic centrifugal
type
Type
Two-stage reduction
Reduction 1st
0.83~2.2
ratio
2nd
10.41
Front
Caster angle
28°
Axle
Trail length
140mm
Tire pressure
Front
2.0
(kg/cm
²
) 1
person
Rear
2.25
Turning
Left
40
?
angle
Right
40
?
Brake system
Front
Disk brake
type
Rear
Disk brake
Front
Telescope
Suspension
type
Rear
DOUBLE SWING
Frame type
PIPE UNDER BONE
Red
u
ctio
n
Gear
Transmis-
sion
Gear
Fuel
System
Power
D
rive
System
Electrical
Equip.
Ignition
System
Moving
Device
Damping
Device
DOWNTOWN 125i
