| Engine | Yamaha YBR 125 | Kawasaki Z650 |
|---|---|---|
| Displacement | 125 cc | 649 cc |
| Max power | 10 hp (@7 800 RPM) | 65 hp (@6 500 RPM) |
| Max torque | 6 lb ft (@6 000 RPM) | 50 lb ft (@8 000 RPM) |
| Redline | 10 000 RPM | 9 500 RPM |
| Idling speed | 1 250 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | SOHC Single | DOHC Inline-2 |
| Compression | 10.00:1 | 10.80:1 |
| Oil capacity | 1.14 quart | 1.99 quart |
| Oil type | 10W30, 10W40 | 10W40 |
| Spark plug type | NGK CR6HSA | NGK CR9EIA-9 |
| Cooling | Air | Liquid |
| Valves | 2 | 8 |
| Bore | 54.0 mm | 83.0 mm |
| Stroke | 54.0 mm | 60.0 mm |
| Throttle bore | 36.0 mm | |
| Weight to power | 28.66 lbs/hp | 6.34 lbs/hp |
| Power to weight | 87 hp/2500lbs | 394 hp/2500lbs |
| Battery type | YTX7L-BS, 12V 6Ah | 12V 8.6Ah |
| Gearbox | Yamaha YBR 125 | Kawasaki Z650 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | RK 520 | |
| Gears count | 5 | 6 |
| Primary ratio | 3.4 | 2.095 |
| Final drive | 3.071 | 3.067 |
| 1. gear | 2.643 (26 mph) | 2.438 (44 mph) |
| 2. gear | 1.778 (39 mph) | 1.714 (63 mph) |
| 3. gear | 1.316 (53 mph) | 1.333 (81 mph) |
| 4. gear | 1.045 (66 mph) | 1.111 (97 mph) |
| 5. gear | 0.875 (79 mph) | 0.966 (112 mph) |
| 6. gear | 0.852 (127 mph) |
| Chasis | Yamaha YBR 125 | Kawasaki Z650 |
|---|---|---|
| Frame type | Diamond steel | Trellis, high tensile steel |
| Front susp. | Telescopic fork, 110mm | 41mm Telescopic fork, 4.88 in travel |
| Rear susp. | Swingarm, 4.13 in travel | Monoshock |