Horex 644 Osca (1988) vs Horex Imperator 125 (1997) vs Horex Imperator 400 (1955-60)
Comparison technical specifications
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| Make: | Horex | Horex | Horex |
| Model: | 644 Osca | Imperator 125 | Imperator 400 |
| Years: | 1988 | 1997 | 1955-60 |
| Engine: | Four stroke, single Cylinder, SOHC,, 4 valve per cylinder. (Honda Dominator) | Four stroke, single cylinder. | Four stroke, parallel twin cylinder. |
| Capacity: | 644 cc / 39.2 cu-in | 124 xcc / 7.6 cu-in | 400 cc / 24.4 cu-in |
| Bore x Stroke: | 100 x 82 mm | 61,5 x 66 mm | |
| Cooling System: | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 8.7;1 | 7.25:1 | |
| Induction: | Carburetor | Carburetor | Carburetor |
| Starting: | Electric | Kick | Kick |
| Max Power: | 50 hp / 36 kW @ 7000 rpm | 9.0 hp / 6.6 kW @ | 18.9 kW / 26 hp @ 6790 rpm |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | Earles forks | |
| Rear Suspension: | Swing arm | Dual shocks | |
| Front Brakes: | 2x discs | Single disc | 190mm Drum |
| Rear Brakes: | Single disc | Drum | 190mm Drum |
| Front Tyre: | NA | 3.25 -18 | |
| Rear Tyre: | NA | 3.50 -18 | |
| Fuel Capacity: | 12 Litres / 3.1 US gal | 17 Litres / 4.5 US gal |