| Year | 1998 |
| Bore x Stroke | 100 x 82 mm |
| Braking 60 - 0 / 100 - 0 | 13.8 m / 40.4 m |
| Capacity | 644 cc / 39.2 cu-in |
| Clutch | Wet, multiple discs, cable operated |
| Compression Ratio | 8.3:1 |
| Consumption Average | 17.8 km/lit |
| Cooling System | Air cooled |
| Dry Weight | 163 kg / 359.3 lbs |
| Engine | Four-stroke, single cylinder, SOHC, 4 valve per cylinder |
| Final Drive | Chain |
| Fork Angle | 62° |
| Frame | Steel, Single cradle frame |
| Front Brakes | Single 256mm disc 2 piston caliper |
| Front Suspension | 41mm leading-axle fork |
| Front Tyre | 90/90–21 |
| Front Wheel Travel | 220 mm / 8.6 in |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Ground Clearance | 250 mm / 9.8 in |
| Ignition | Digital CDI |
| Induction | Single 40mm Keihin VE-type carburetor |
| Max Power | 45 hp / 33.5 kW @ 6000 rpm |
| Max Torque | 53 Nm / 5.7 kgf-m @ 5000 rpm |
| Rear Brakes | Single 220mm disc 1 piston caliper |
| Rear Suspension | Pro-Link, |
| Rear Tyre | 120/90–17 |
| Rear Wheel Travel | 195 mm / 7.6 in |
| Seat Height | 870 mm / 24.2 in |
| Spark Plug | NGK, DPR 8EA-9 |
| Standing ¼ Mile | 13.9 sec / 147.8 km/h |
| Starting | Electric and Kick |
| Top Speed | 160.8 km/h / 100 mph |
| Trail | 115 mm / 4.5 in |
| Transmission | 5 Speed |
| Wet Weight | 178 kg / 392.4 lbs |
| Wheelbase | 1435 mm / 56.4 in |
