Kawasaki KDX 250 (1981-82) vs Kawasaki W 650 (1999-01)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki |
| Model: | KDX 250 | W 650 |
| Years: | 1981-82 | 1999-01 |
| Engine: | Two stroke, single cylinder, reed valve | Four stroke, parallel twin cylinder, SOHC, 4 valve per cylinder |
| Capacity: | 249 cc / 15.2 cu-in | 676 cc / 41.2 cu-in |
| Bore x Stroke: | 70 x 64.9 mm | 72 x 83 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 8.2:1 | 8.7:1 |
| Induction: | 36mm Mikuni carburetor | 2x Keihin CVK34 carburetor |
| Ignition: | CDI | Digital with K-TRIC |
| Starting: | Kick | Electric |
| Max Power: | 33 hp / 24.6 kW @ 7000 rpm | 50 hp / 36.5 kW @ 5000 rpm |
| Max Torque: | 3.5 kgf-m @ 6500 rpm | 56 Nm / 5.71 kg-m @ 5500 rpm |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic forks | 39 mm telescopic fork |
| Rear Suspension: | Mono Shock | Twin shocks with 5-way spring preload adjustment |
| Front Brakes: | Drum | Single 300mm disc 2 piston caliper |
| Rear Brakes: | Drum | 160mm Drum |
| Front Tyre: | 3.00-21 | 100/90-19 |
| Rear Tyre: | 5.10-18 | 130/80-18 |
| Wheelbase: | 1475 mm / 58.0 in | 1465 mm / 57.6 in |
| Seat Height: | 935 mm / 36.8 in | 790 mm / 31.1 in |
| Dry Weight: | 111 kg / 245 lbs | 195 kg / 430 lbs |
| Fuel Capacity: | 12.5 Litres / 3.3 US gal | 15 Litres / 3.96 US gal |