| MODEL | RIEJU SMX 125 4T 2005 |
| Year | 2005 |
| Engine Type | Single cylinder, four-stroke, 2 valves |
| Displacement / Capacity | 125 cc / 7.63 cu in |
| Bore X Stroke | 54 x 54 mm / 2.1 x 2.1 in |
| Compression Ratio | — |
| Cooling System | — |
| Max Power | 10.6 kW / 14.5 hp |
| Max Torque | — |
| Ignition | — |
| Induction | Carburettor, Mikuni VM 20SS |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | Perimetral steel chassis |
| Front Suspension | Paioli |
| Rear Suspension | Paioli |
| Front Brakes | Single disc, 260 mm / 10.2 in |
| Rear Brakes | Single disc, 200 mm / 7.9 in |
| DIMENSION SPECS | |
| Overall Length | 2050 mm / 80.7 in |
| Overall Width | 800 mm / 31.5 in |
| Overall Height | 1170 mm / 46.1 in |
| Seat Height | — |
| Wheelbase | 1332 mm / 52.4 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/80-17 |
| Rear Tyre | 120/80-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 8.4 Litres / 2.22 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 4T badge marks the four-stroke version of the SMX in the mid-2000s, alongside the 50 cc two-stroke. It makes about 14.5 hp from an air-cooled 125 and uses a steel perimeter frame with Paioli suspension at both ends. Wheelbase is 1332 mm.
