| Year | 1974 |
| Bore x Stroke | 45 x 52.3mm |
| Capacity | 249 cc / 15.2 cu-in |
| Compression Ratio | 7,3:1 |
| Cooling System | Air cooled |
| Dimensions | Length 2020 mm / 79.5 inWidth 820 mm / 32.3 in |
| Dry Weight | 149.5 kg / 326 lbs |
| Engine | Two stroke, transverse three cylinder, |
| Final Drive | Chain |
| Frame | Double tubular steel cradle |
| Front Brakes | 180mm Drum |
| Front Suspension | Telescopic hydraulic forks |
| Front Tyre | 3.00 -18 |
| Fuel Capacity | 15 Litres / 3.9 US gal |
| Ground Clearance | 175 mm / 6.9 in |
| Ignition | Battery and coil |
| Induction | 3x Mikuni VM22SC, Ø 22 mm carburetor |
| Max Power | 32 hp / 23.8 kW @ 8 500 rpm |
| Max Torque | 2.54 m-kg / 18.3 lb-ft @ 7 000 rpm |
| Rake | 28° |
| Rear Brakes | 180mm Drum |
| Rear Suspension | Dual shocks, Swing arm |
| Rear Tyre | 3.25 -18 |
| Road Test | 1974 S1 250 Group Test |
| Starting | Kick |
| Trail | 110 mm / 4.3 in |
| Transmission | 5 Speed |
| Wet Weight | 160 kg / 348 lbs |
| Wheelbase | 1585 mm / 62.4 in |
