| MODEL | RIEJU 125 NKD 2006 |
| Year | 2006 |
| Engine Type | Single cylinder, four-stroke |
| Displacement / Capacity | 124 cc / 7.57 cu in |
| Bore X Stroke | 54 x 54 mm / 2.1 x 2.1 in |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | Mikuni VM20SS carburettor |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Perimetral double beam, high-resistance steel |
| Front Suspension | Upside-down hydraulic fork, 35 mm |
| Rear Suspension | Monoshock |
| Front Brakes | Single disc, double piston, 280 mm / 11.0 in |
| Rear Brakes | Single disc, 220 mm / 8.7 in |
| DIMENSION SPECS | |
| Overall Length | 1900 mm / 74.8 in |
| Overall Width | — |
| Overall Height | 1010 mm / 39.8 in |
| Seat Height | 800 mm / 31.5 in |
| Wheelbase | 1300 mm / 51.2 in |
| Ground Clearance | — |
| Dry Weight | 107.5 kg / 237 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/80-17 |
| Rear Tyre | 130/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.64 US gal |
| Fuel Consumption | — |
| Top Speed | — |
First-year version of the 125 NKD naked bike, with a Yamaha-built air-cooled four-stroke engine. It is essentially the same package as the following year's model on the source page, minus a stated power figure.
