Kawasaki W 650 (2005-07) vs Yamaha YZF 600 R6 (2006) vs Yamaha YZF 1000R Thunder ace (2002)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Yamaha |
| Model: | W 650 | YZF 600 R6 | YZF 1000R Thunder ace |
| Years: | 2005-07 | 2006 | 2002 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 4 valve per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 5 valves per cylinder |
| Capacity: | 676 cc / 41.2 cu-in | 599 cc / 36.5 cu-in | 1002 cc / 61.1 cu-in |
| Bore x Stroke: | 72 x 83 mm | 67 x 42.5 mm | 75.5 x 56 mm |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 8.7:1 | 12.4;1 | 11.5:1 |
| Lubrication: | Wet sump | Wet sump | Wet sump |
| Induction: | 2x Keihin CVK34 carburetor | Fuel Injection 38mm throttle bodies | 4x 38mm Mikuni BDSR38 with TPS carbs |
| Ignition: | Digital with K-TRIC | TCI | Digital TCI |
| Starting: | Electric | Electric | Electric |
| Max Power: | 50 hp / 36.5 kW @ 5000 rpm | 124.6 hp / 91.7 kW @14500 rpm | 145 hp / 106.7kW @ 10000 rpm |
| Max Torque: | 56 Nm / 5.71 kg-m @ 5500 rpm | 69.1 Nm / 7.05 kg-m @ 11000 rp @ 1100 rpm | 108.3Nm / 11kgf-m @ 8500 rpm |
| Transmission: | 5 Speed | 6 Speed | 5 speed |
| Final Drive: | Chain | O-ring Chain | Chain |
| Front Suspension: | 39 mm telescopic fork | 41mm upside down forks with 2-way compression damping adjustable | 45mm forks, adjustable preload, bump and rebound. |
| Rear Suspension: | Twin shocks with 5-way spring preload adjustment | Fully adjustable rear shock absorber with 2-way compression damping | Mono shock adjustable preload, bump and rebound. |
| Front Brakes: | Single 300mm disc 2 piston caliper | 2x 320mm discs | 2x 298mm discs 4 piston calipers |
| Rear Brakes: | 160mm Drum | Single 220mm disc | Single 245mm disc 2 piston caliper |
| Front Tyre: | 100/90-19 | 120/70 ZR17 | 120/70 ZR17 |
| Rear Tyre: | 130/80-18 | 180/55 ZR17 | 180/55 ZR17 |
| Dimensions: | Length 2180 mm / 85.8 in Width 790 mm / 31.1 in Height 1075 mm / 42.3 in | Length 2040 mm / 80.3 in Width 705 mm / 27.8 in Height 1100 mm / 43.3 in | Length 2085mm / 82.0 in Width 740 mm / 29.1 in |
| Wheelbase: | 1465 mm / 57.6 in | 1380 mm / 53.4 in | 1433 mm / 56.4 in |
| Seat Height: | 790 mm / 31.1 in | 850 mm / 33.5 in | 795 mm / 31.3 in |
| Dry Weight: | 195 kg / 430 lbs | 162 kg / 357 lbs (single seat 161 kg) | 198 kg / 436.5 lbs |
| Fuel Capacity: | 15 Litres / 3.96 US gal | 17.5 Litres / 4.6 gal | 19 Litres / 5.0 gal |