| Engine | Aprilia RS660 | Kawasaki Ninja 650 |
|---|---|---|
| Displacement | 660 cc | 649 cc |
| Max power | 100 hp (@10 500 RPM) | 71 hp (@8 500 RPM) |
| Max torque | 49 lb ft (@8 500 RPM) | 47 lb ft (@7 000 RPM) |
| Redline | 12 000 RPM | 11 000 RPM |
| Idling speed | 1 200 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-2 | DOHC Inline-2 |
| Compression | 13.50:1 | 10.80:1 |
| Oil capacity | 2.18 quart | |
| Oil type | 10W40 | |
| Spark plug type | NGK CR9EIA-9 | |
| Cooling | Liquid | Liquid |
| Valves | 8 | 8 |
| Bore | 81.0 mm | 83.0 mm |
| Stroke | 63.0 mm | 60.0 mm |
| Throttle bore | 48.0 mm | 38.0 mm |
| Weight to power | 4.03 lbs/hp | 6.49 lbs/hp |
| Power to weight | 619 hp/2500lbs | 385 hp/2500lbs |
| Battery type | 12V 10Ah |
| Gearbox | Aprilia RS660 | Kawasaki Ninja 650 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | ||
| Gears count | 0 | 6 |
| Primary ratio | 2.095 | |
| Final drive | 2.52 | 3.067 |
| 1. gear | 2.438 (52 mph) | |
| 2. gear | 1.714 (73 mph) | |
| 3. gear | 1.333 (94 mph) | |
| 4. gear | 1.111 (112 mph) | |
| 5. gear | 0.966 (129 mph) | |
| 6. gear | 0.852 (147 mph) |
| Chasis | Aprilia RS660 | Kawasaki Ninja 650 |
|---|---|---|
| Frame type | Double beam aluminum | Twin-pipe perimiter design, steel |
| Front susp. | 41mm KYB USD, 4.72 in travel | 41mm fork, 4.92 in travel |
| Rear susp. | Monoshock, 5.12 in travel | Monoshock, 5.12 in travel |