| Engine | Aprilia RS660 | Kawasaki Z900 |
|---|---|---|
| Displacement | 660 cc | 948 cc |
| Max power | 100 hp (@10 500 RPM) | 125 hp (@9 500 RPM) |
| Max torque | 67 Nm (@8 500 RPM) | 98 Nm (@7 700 RPM) |
| Redline | 12 000 RPM | 10 500 RPM |
| Idling speed | 1 200 RPM | 1 100 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-2 | DOHC Inline-4 |
| Compression | 13.50:1 | 11.80:1 |
| Oil capacity | 4.00 litre | |
| Spark plug type | NGK CR9EIA-9 | |
| Cooling | Liquid | Liquid |
| Valves | 8 | 16 |
| Bore | 81.0 mm | 73.4 mm |
| Stroke | 63.0 mm | 56.0 mm |
| Throttle bore | 48.0 mm | |
| Weight to power | 1.83 kg/hp | 1.68 kg/hp |
| Power to weight | 546 hp/Ton | 595 hp/Ton |
| Battery type | 12 V 8 Ah, YTX9-BS |
| Gearbox | Aprilia RS660 | Kawasaki Z900 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | ||
| Gears count | 0 | 6 |
| Primary ratio | 1.627 | |
| Final drive | 2.52 | 2.933 |
| 1. gear | 2.692 (97 km/h) | |
| 2. gear | 2.059 (127 km/h) | |
| 3. gear | 1.65 (158 km/h) | |
| 4. gear | 1.409 (185 km/h) | |
| 5. gear | 1.222 (214 km/h) | |
| 6. gear | 1.034 (253 km/h) |
| Chasis | Aprilia RS660 | Kawasaki Z900 |
|---|---|---|
| Frame type | Double beam aluminum | Tubular backbone (with engine subframe), high tensile steel |
| Front susp. | 41mm KYB USD, 120.00 mm travel | 41 mm inverted fork (120 mm travel) |
| Rear susp. | Monoshock, 130.00 mm travel | Bottom-Link Uni-Trak (137 mm travel) |