Kawasaki S1 250SS MKI (1972-73) vs Kawasaki Z125 (2019) vs Kawasaki GPz 400F-II (1985)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki |
| Model: | S1 250SS MKI | Z125 | GPz 400F-II |
| Years: | 1972-73 | 2019 | 1985 |
| Engine: | Two stroke, transverse three cylinder, | Four stroke, single cylinder, DOCH, 4 valve | Four stroke, transverse four cylinder, DOHC, 2 Valve per cylinder. |
| Capacity: | 249 cc / 15.2 cu-in | 125 cc / 7.6 cu in | 399 cc / 24.3 cu-in |
| Bore x Stroke: | 45 x 52.3mm | 58.0 x 47.2mm | 52 х 47mm |
| Cooling System: | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 7,3:1 | 11.7:1 | 9.5:1 |
| Induction: | 3x Mikuni VM22SC, Ø 22 mm carburetor | Fuel injection (ø28 x 1) | 4 x 21mm Teir-Kei carburetors |
| Ignition: | Battery and coil | B&C (TCBI, B. P&EL. ADV.) | CDI |
| Starting: | Kick | Electric | Electric |
| Max Power: | 32 hp / 23.8 kW @ 8 500 rpm | 11.0 kW / 14.8 hp @ 10,000 rpm | 54 hp / 40.2 kW @ 11500 rpm |
| Max Torque: | 2.54 m-kg / 18.3 lb-ft @ 7 000 rpm | 11.7 Nm / 8.6 lb-ft @ 7,700 rpm | 34.3 Nm / 25.2 lb-ft @ 8500 rpm |
| Transmission: | 5 Speed | 6 Speed, return shift | 6 Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic hydraulic forks | 37mm Telescopic Fork | Telescopic forks |
| Rear Suspension: | Dual shocks, Swing arm | Uni Track Swingarm | Swing arm |
| Front Brakes: | 180mm Drum | Single 290mm Disc, Dual Piston Calipers | Single 236mm disc |
| Rear Brakes: | 180mm Drum | Single 220mm Disc | Single 140mm drum |
| Front Tyre: | 3.00 -18 | 100/80-17M/C 52S | 90/90-19 |
| Rear Tyre: | 3.25 -18 | 130/70-17M/C 62S | 110/90-18 |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 11 Litres / 2.9 US gal | 15 Litres / 3.9 US gal |