| Engine | Yamaha R6 | Kawasaki Z650 |
|---|---|---|
| Displacement | 600 cc | 649 cc |
| Max power | 121 hp (@13 000 RPM) | 65 hp (@6 500 RPM) |
| Max torque | 44 lb ft (@12 000 RPM) | 50 lb ft (@8 000 RPM) |
| Redline | 15 500 RPM | 9 500 RPM |
| Idling speed | 1 200 RPM | |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-4 | DOHC Inline-2 |
| Compression | 12.40:1 | 10.80:1 |
| Oil capacity | 3.22 quart | 1.99 quart |
| Oil type | 10W40, Motul 300V 10W40, Shell Rotella 10W40 | 10W40 |
| Spark plug type | NGK CR9EK, NGK CR10EK | NGK CR9EIA-9 |
| Cooling | Liquid | Liquid |
| Valves | 16 | 8 |
| Bore | 65.5 mm | 83.0 mm |
| Stroke | 44.5 mm | 60.0 mm |
| Throttle bore | 38.0 mm | 36.0 mm |
| Weight to power | 3.32 lbs/hp | 6.34 lbs/hp |
| Power to weight | 753 hp/2500lbs | 394 hp/2500lbs |
| Battery type | 12 V 8 Ah, GT9B-4 | 12V 8.6Ah |
| Gearbox | Yamaha R6 | Kawasaki Z650 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | RK 520 | |
| Gears count | 6 | 6 |
| Primary ratio | 1.955 | 2.095 |
| Final drive | 3.0 | 3.067 |
| 1. gear | 2.846 (68 mph) | 2.438 (44 mph) |
| 2. gear | 1.947 (100 mph) | 1.714 (63 mph) |
| 3. gear | 1.556 (125 mph) | 1.333 (81 mph) |
| 4. gear | 1.333 (146 mph) | 1.111 (97 mph) |
| 5. gear | 1.19 (164 mph) | 0.966 (112 mph) |
| 6. gear | 1.083 (180 mph) | 0.852 (127 mph) |
| Chasis | Yamaha R6 | Kawasaki Z650 |
|---|---|---|
| Frame type | Diamond | Trellis, high tensile steel |
| Front susp. | Telescopic fork USD, 4.72 in travel | 41mm Telescopic fork, 4.88 in travel |
| Rear susp. | Swingarm link, spring/gas-oil damper | Monoshock |