If straight-line speed is your priority, the Ninja ZX-6R takes the lead. With 27 HP more than the RS 660 Extrema, it offers a more spirited ride that will be noticeable on highway overtakes or track days. When it comes to agility, the RS 660 Extrema has a clear advantage. Weighing in 18kg less than the Ninja ZX-6R, it will feel significantly easier to handle in low-speed traffic, parking maneuvers, and twisty corners. Bottom Line: While both are capable, the zx6r offers a superior power-to-weight ratio, making it the more exciting machine for experienced riders.
| Spec | RS 660 Extrema | Ninja ZX-6R |
|---|---|---|
| Displacement | 659 | 636 |
| Power | 100 | 127 |
| Cylinders | 2 | 4 |
| Weight | 180 | 198 |
| Seat height | 820 | 830 |
| MSRP (US) | 13499 | 11599 |
| MSRP (EU) | 13499 | 12695 |