| MODEL | HOREX OSCA 644 1989 - 1990 |
| Year | 1989 - 1990 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 valves |
| Displacement / Capacity | 644 cc / 39.2 cu in |
| Bore X Stroke | 100 x 82 mm |
| Compression Ratio | 8.7:1 |
| Cooling System | Air cooled |
| Max Power | 36 kW / 50 hp @ 7000 rpm |
| Max Torque | 57 Nm @ 5500 rpm |
| Ignition | CDI |
| Induction | Carburetor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Swing arm |
| Front Brakes | 2x discs |
| Rear Brakes | Single disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 138 kg / 304 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A short-lived 1990 revival attempt that put a Honda 644 cc single into a new chassis styled in Japan by CK Design, shown at the Berlin show. With about 50 hp, disc brakes at both ends and electric start it was a modern roadster rather than a copy of the old Regina. It never reached series production.
