| Year | 1987 |
| Bore x Stroke | 82 x 61.5 mm |
| Capacity | 649.6 cc / 39.6 cu in. |
| Compression Ratio | 8.4:1 |
| Cooling System | Air cooled |
| Engine | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Final Drive | Shaft |
| Front Brakes | Single ∅260mm disc |
| Front Suspension | Telescopic hydraulic forks |
| Front Tyre | 3.00-21" |
| Fuel Capacity | 19.5 L / 5.2 US gal |
| Ignition | Bosch electronic |
| Induction | 2 x Bing constant depression carburetors |
| Max Power | 33 kW / 45 hp 33 kW @ 7250 rpm |
| Max Torque | 45.1 Nm / 4.6 kgf-m 33.3 lb-ft. @ 6000 rpm |
| Rear Brakes | Simple ∅200mm drum |
| Rear Suspension | Monolever - swinging arm |
| Rear Tyre | 4.00-18" |
| Transmission | 5 Speed |
| Wet-Weight | 198 kg / 437 lbs |
