| Year | 2006 |
| Air Filtration | Oiled polyurethane foam |
| Bore x Stroke | 100 x 82.6 mm |
| Capacity | 644 cc / 39.6 cu-in |
| Clutch | Multi-plate, wet, Cable operating Clutch Operation System |
| Compression Ratio | 10.0:1 |
| Cooling System | Liquid cooled |
| Dimensions | Length 2255 mm / 88.8 in Width 825 mm / 32.5 in Height 1245 mm / 49.0 in |
| Dry Weight | 138 kg / 304.2 lbs |
| Engine | Four stroke, single cylinder SOHC, 4 valve |
| Final Drive | Chain |
| Final Reduction | 3.429 (48/14) |
| Frame | Semi-double cradle |
| Front Brakes | Single 240 mm disc 2 piston caliper |
| Front Suspension | 46 mm Kayaba fork with compression and rebound-damping adjustability |
| Front Tyre | 80/100-21 |
| Front Wheel Travel | 285 mm / 11.2 in |
| Fuel Capacity | 9.8 Liters / 2.6 US gal |
| Gear Ratio | 1st: 3.083 (37/12) 2nd: 2.125 (34/16) 3rd: 1.666 (30/18 ) 4th: 1.333 (28/21) 5th: 1.115 (29/26) |
| Ground Clearance: | 305 mm / 12.0 in |
| Ignition | Solid-state CDI (Capacitive Discharge Ignition) |
| Induction | 42 mm / 1.7 in Piston valve Keihin carburetor |
| Lubrication | Forced pressure and dry sump |
| Max Power | 61.2 hp / 44.6 kW @ 6750 rpm |
| Max Torque | 64 Nm / 47.2 lb-ft @ 5500 rpm |
| Oil System | Oil Pump Type: Trochoid/double rotor |
| Primary Reduction | 1.651 (71/43) |
| Rake | 27.8° |
| Rear Brakes | Single 240 mm disc 1 piston caliper |
| Rear Suspension | Pro-Link Kayaba single-shock with spring-preload, compression- and rebound-damping adjustability |
| Rear Tyre | 110/100-18 |
| Rear Wheel Travel | 307 mm / 12.0 in |
| Seat Height | 939 mm / 37.0 in |
| Starting | Electric |
| Trail | 111 mm / 4.3 in |
| Transmission | Constant mesh, 5 speeds |
| Valve System | Intake Valve Opens: 15 degrees BTDC Intake Valve Closes: 45 degrees ABDC Exhaust Valve Opens: 45 degrees BBDC Exhaust Valve Closes: 15 degrees ATDC |
| Wet Weight | 150.0 kg / 330.6 lbs |
| Wheelbase | 1425 mm / 56.1 in |
