Kawasaki Z 650 (2020) vs Yamaha RD 250 (1972) vs Honda CBR 650F (2014)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Honda |
| Model: | Z 650 | RD 250 | CBR 650F |
| Years: | 2020 | 1972 | 2014 |
| Engine: | Four stroke, parallel twin cylinder. DOHC, 4 valves per cylinder. | Two stroke, torque induction, parallel twin | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. |
| Capacity: | 649 cc / 39.65 cu /in | 247 cc / 15.0 cu-in | 649 cc / 39.6 cu-in |
| Bore x Stroke: | 83 x 60 mm | 54 х 54 mm | 67 x 46mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 10.8:1 | 6.7:1 | 11.4:1 |
| Induction: | DFI® with Keihin 36mm Keihin throttle bodies | 2x Mikuni VM28 SC carburetor | PGM-FI electronic fuel injection |
| Ignition: | TCBI with electronic advance | Battery and coil with breaker points | Digital transistorized with electronic advance |
| Starting: | Electric | Kick | Electric |
| Max Power: | 50.2 kW / 67.3 hp @ 8,500 rpm | 30 hp / 22.3 kW @ 7500 rpm | 64 kW / 85.8 hp @ 11000rpm (95/1/EC) |
| Max Torque: | 65.7 Nm / 48.4 lb-ft @ 7000 rpm | 21 lb-ft / 2.9 kgf-m @ 7000 rpm | 63 Nm / 46.4 lb-ft @ 8,000rpm (95/1/EC) |
| Clutch: | Wet multi-disc, manual | Wet multi-plate | Wet, multiplate with coil springs |
| Transmission: | 6 Speed | 6 Speed | Close-ratio 6 Speed |
| Final Drive: | Sealed chain | Chain | #525 O-ring chain |
| Front Suspension: | 41 mm hydraulic telescopic fork | Telescopic forks | 41mm conventional telescopic fork |
| Rear Suspension: | Horizontal Back-link with adjustable preload | Dual shocks | Monoshock damper with adjustable preload |
| Front Brakes: | 2x 300mm discs 4 piston calipers | Drum | 2x 320mm discs 2 piston calipers |
| Rear Brakes: | Single 220mm disc | Drum | Single 220mm disc 1 piston caliper |
| Front Tyre: | 120/70 -17 | 3.00S-18-4PR | 120/70-ZR17M/C (58W) |
| Rear Tyre: | 160/50 -17 | 3.50S-18-4PR | 180/55-ZR17M/C (73W) |
| Dimensions: | Length 2055 mm / 80.9 in. Width 779 mm / 30.6 in Height 1080 mm / 42.5 in | Length 2030 mm / 79.9 in Width 830 mm / 32.6 in Height 1085 mm / 42.7 in | Length 2110 mm / 83 in Width 755 mm / 29.7 in Height 1145 mm / 45.0 in |
| Wheelbase: | 1410 mm / 55.5 in. | 1325 mm / 52.1 in | 1450 mm / 57.0 in |
| Ground Clearance: | 130 mm / 5.1 in | 150 mm / 5.9 in | 130 mm / 5.1 in |
| Fuel Capacity: | 15 Litres / 4.0 US gal | 16.5 Liters / 4.2 US gal | 17.3 Liters / 4.5 gal |