COPY
‑A5‑
Nov./29/ 12
Type
4-cycle gasoline
Displacement
123.7cc
Number of cylinder and arrangement Horizontal single cylinder
Cooling method
Air-cooling
Valve train
DOHC(desmodromic) valve, chain / gear drive.
Chamber design
Pentroof (Hemispherical) type
Bore and Stroke
54mm x 54mm
Compression ratio
12.5 : 1
Intake 25
Exhaust 20
Valve timing:
(1mm lift)
Intake open
15°BTDC
closed
47°ABDC
Exhaust open
45°BBDC
closed
10°ATDC
Lubricating method
Combined use of force feed system & splash lubrication system
Pump type
Trochoid type
Capacity
0.8 liter
Fuel to be used
Ignition system
C.D.I. ignition
Spark plug
NGK-ER8EH
Starting method
Kickstarter system
Power transmission
Clutch
Wet multi-disk
Operating mode
Mechanical
Transmission
Type
Constant mesh, 5-speed return
Gear ratio
1st speed
2.357 (33 / 14)
2nd speed
1.764 (30 / 17)
3rd speed
1.400 (28 / 20)
4th speed
1.136 (25 / 22)
5th speed
1.000 (24 / 24)
rear-wheel-drive mechanism
Type
Chain drive
Main Reference Value
High-octane gasoline
（research method: over 97 octane value)
Camshaft type
Items
Frequency
Refer to page
Clean and Inspect Spark Plug
Every 200km
P-C1
Inspect Valve Clearance
Every 500〜600km
Change Engine Oil
Every 1000〜2000km
P-C1
Adjust and Inspect Carburetor
Each time
Depend on Carburetor type
Replace Oil Filter
Every 1500〜2000km
P-C2
Adjust Clutch Cable
Every 250km
P-C2
Inspect Clutch Friction Disc
Every 1000km
See Service Manual
Inspect Piston and Piston Ring
Every 1000km
See Service Manual
Inspect Piston Pin
Every 2000km
See Service Manual
Inspect Crankshaft
Every 1000km
See Service Manual
Inspect Cylinder Head and Cylinder
Every 2500km
See Service Manual
Inspect Crankcase
Every 2000km
See Service Manual
Inspect and Adjust
※
Maintenance period in the table is a guideline. You might need to work more frequently
depending on the motorcycle usage or condition.
We recommend more frequently maintenance than the maintenance period.
