| MODEL | HONDA CB 125S/J 1979 |
| Year | 1979 |
| Engine Type | Four stroke, single cylinder, SOHC, 2 valves |
| Displacement / Capacity | 124 cc / 7.6 cu in |
| Bore X Stroke | 56.5 x 49.5 mm |
| Compression Ratio | 7.4:1 |
| Cooling System | Air cooled |
| Max Power | 10.3 kW / 14 hp @ 10000 rpm |
| Max Torque | 9.9 Nm / 7 lb-ft @ 9400 rpm |
| Ignition | Battery & coil |
| Induction | Keihin 24 mm slide type carburettor, manual choke |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | Wet, multi-disc |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Oil-damped telescopic forks |
| Rear Suspension | Swing arm, dual shocks |
| Front Brakes | Drum |
| Rear Brakes | 110 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 95 kg / 209 lbs |
| Wet Weight | 105 kg / 231 lbs |
| WHEEL SPECS | |
| Front Tyre | 2.75-18 |
| Rear Tyre | 3.00-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 9.5 Litres / 2.5 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1979 CB125S/J kept the 124 cc single-cylinder engine and five-speed gearbox of the 1976 update. The main change was a return to a drum front brake, making it simpler and cheaper. It remained a basic, economical learner and commuter motorcycle.
