| Year | 1987 |
| Bore x Stroke | 87 х 67.2 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Compression Ratio | 9.2:1 |
| Cooling System | Air cooled |
| Dry Weight | 147 kg / 324 lbs |
| Engine | Four stroke, single cylinder, SOHC, 4 valves |
| Final Drive | Chain, 428 Heavy Duty O-Ring, 138 links |
| Front Brakes | Single 320mm disc 4 piston caliper |
| Front Suspension | Telescopic forks |
| Front Tyre | 110/70-17 Tubeless |
| Fuel Capacity | 15 Liters / 3.9 US gal |
| Ignition | TCI |
| Induction | YDIS Twin Carburetor |
| Max Power | 33 hp / 24.6 kW @ 7000 rpm |
| Max Torque | 3.4 kgf-m / 24.5 lb-ft @ 6000 rpm |
| Rear Brakes | Single disc |
| Rear Suspension | Dual shocks |
| Rear Tyre | 140/70-17 Tubeless |
| Spark Plug | DPR8EA-9, IX24B, DPR8EIX |
| Sprocket Front / Rear | 17 / 50 |
| Starting | kick |
| Transmission | 5 Speed |
