| MODEL | RIEJU RR 125 FUN BIKE 1998 |
| Year | 1998 |
| Engine Type | Single cylinder, two-stroke (Gas Gas trials-based engine) |
| Displacement / Capacity | 125 cc / 7.63 cu in |
| Bore X Stroke | 56 x 50.6 mm / 2.2 x 2 in |
| Compression Ratio | 9.0:1 |
| Cooling System | Liquid |
| Max Power | 6.9 kW / 9.5 hp @ 7200 rpm |
| Max Torque | — |
| Ignition | Electric |
| Induction | Carburettor, Dell'Orto PHBL 26 |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed |
| Clutch | Wet plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tubular |
| Front Suspension | Inverted fork, 32 mm Showa |
| Rear Suspension | Gas monoshock |
| Front Brakes | Single disc, 220 mm / 8.7 in |
| Rear Brakes | Single disc, 185 mm / 7.3 in, 2-piston |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 95 kg / 209.4 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | 5.5 Litres / 1.45 US gal |
| Fuel Consumption | — |
| Top Speed | 80 km/h / 49.7 mph |
The RR 125 Fun Bike of 1998 is a lightweight fun and learner bike built around a Gas Gas-sourced 125 two-stroke, with Showa upside-down forks and AJP brakes. At under 100 kg it was light and quick off the line.
