1. Quick Reference
1-3
2.
Specifications
Model Code
AHG1
Overall Length (mm)
2165
Overall Width (mm)
780
Overall High (mm)
1290
Wheel Base (mm)
1545
Engine Type
Four Stroke OHC
Displacement (cc)
124
Fuel Recommended
None lead 92#
Curb Weight (kg)
Front Wheel
80
Rear Wheel
99
Total
178
Max. weight capacity
(kg)
Front Wheel
125
Rear Wheel
219
Total
344
Tires
Front Wheel
120/80-14 58S
Rear Wheel
150/70-13 64S
Ground clearance (mm)
135
Pe
rfo
rm
an
ce
Braking distance (m)
7.9m/ 40km/h
Min. turning radius (mm)
R/L 2545
En
g
in
e
Starting system
Starting motor
Type
Gasoline, 4-stroke
Cylinder arrangement
Single Cylinder
Combustion chamber type
Semi-sphere
Valve arrangement
OHC
Bore x stroke (mm)
⌀
54*54.3
Compression ratio
11.2
±
0.2
Compression pressure (kgf/cm
2
)
15
Max. Horsepower (ps/rpm)
21.0/7500
Max. Torque (kg-m/rpm)
1.12/7000
Valve clearance (cold)
(mm)
Intake
0.1
Exhaust
0.1
Idle speed (rpm)
1700
±
100
Lu
b
ri
ca
te
S
ys
te
m
Lubrication type
Forced pressure &
Wet sump
Oil Pump Type
Inner/outer rotor
type
Oil Filter Type
Full-flow filtration
Engine Oil
Disassembly
1.2L
Exchange
1.0L
Gear Oil
Disassembly
0.13L
Exchange
0.12L
C
o
o
lin
g
S
ys
te
m
Cooling Type
Liquid Cooling
Coolant
capacity
Coolant radiator
0.87L
Reserve tank
0.49L
Fi
Sy
st
em
Air cleaner type & No
Paper element, wet
Fuel capacity
12.5L
Throttle
Body
Type
M4C
Venturi dia (mm)
⌀
27
Throttle Valve
Butterfly type
Ele
ct
ri
ca
l E
q
u
ip
m
en
t
Ig
n
itio
n
S
ys
te
m
Type
Inductive Ignition
Coil
Ignition Timing
ECU Controls
Spark plug
Spec
NGK-CPR7EA
Gap (mm)
0.7
~
0.8
Battery Capacity
12V 8Ah
Po
w
er
D
ri
ve
S
ys
te
m
Clutch
Type
Dry Multi-clutch
Transmission
Gear
Type
CVT
Operation
Automatic
centrifugal type
Reduction
Gear
Type
2-staged Reduction
Reduction
Ratio
1 st
0.83~2.2
2 nd
10.41
M
o
vi
n
g
D
evi
ce
Wheel Type
Tubeless
Rim Material
Aluminum
Tire Pressure (kgf/cm
2
)
(2 People)
Front
Wheel
2.0
Rear
Wheel
2.25
Turning Angle
Left
40
°
Right
40
°
Brake System Type
Front
Single Disk
(
260
)
Rear
Single Disk
(
240
)
D
am
p
in
g
Suspension Type
Front
TELESCOPE
Rear
Dual damper unit
swing arm
Chassis Type
UNDER BONE
Summary of Contents for AHG1
Page 3: ...1 Quick Reference 1 2 1 Engine Frame Serial Number Frame Serial Number Engine Serial Number ...
Page 14: ...1 Quick Reference 1 13 8 General Troubleshooting Engine lacks power 8 1 ...
Page 15: ...1 Quick Reference 1 14 ...
Page 16: ...1 Quick Reference 1 15 Engine will not stat or is hard to start 8 2 ...
Page 17: ...1 Quick Reference 1 16 Poor handling 8 3 ...
Page 18: ...1 Quick Reference 1 17 Poor performance at high speed 8 4 ...
Page 19: ...1 Quick Reference 1 18 Poor performance at low and idle speed 8 5 ...
Page 20: ...2 External components Exhaust pipe 2 0 2 ...
Page 21: ...2 External components Exhaust pipe 2 1 ...
Page 57: ...4 LUBRICATION SYSTEM 4 1 Lubrication System ...
Page 66: ...5 ENGINE 5 1 Engine 1 ENGINE REMOVAL INSTALLATION 4 1 1 Removal 4 1 2 Installation 6 ...
Page 73: ...6 CYLINDER HEAD VALVE 6 2 1 SCHEMATIC DRAWING ...
Page 87: ...7 CYLINDER PISTON 7 2 1 SCHEMATIC DRAWING ...
Page 97: ...8 DRIVE DRIVEN PULLEYS 8 2 1 SCHEMATIC DRAWING ...
Page 111: ...9 FINAL REDUCTION 9 2 1 SCHEMATIC DRAWING ...
Page 122: ...10 A C GENERATOR STARTER CLUTCH Downtown 125i 10 2 SCHEMATIC DRAWING ...
Page 130: ...11 Crank Case Crank Shaft 11 2 1 Schematic Drawing ...
Page 134: ...11 Crank Case Crank Shaft 11 6 Remove the oil seal from the left crankcase ...
Page 156: ...14 FRONT ASSEMBLY 14 2 1 SCHEMATIC DRAWING ...
Page 157: ...14 FRONT ASSEMBLY 14 3 ...
Page 176: ...15 REAR ASSEMBLY 15 2 1 SCHEMATIC DRAWING ...
Page 196: ...18 STARTING SYSTEM 18 2 1 Starting System Layout Battery Start Relay Start Motor ...
Page 224: ...20 ANTI LOCK BRAKE SYSTEM ABS 20 5 Pre diagnosis Inspection Chart 1 ...
Page 225: ...20 ANTI LOCK BRAKE SYSTEM ABS 20 6 Pre diagnosis Inspection Chart 2 ...