Kawasaki S1 250SS MKI (1972-73) vs Yamaha WR 125R (2013-14)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha |
| Model: | S1 250SS MKI | WR 125R |
| Years: | 1972-73 | 2013-14 |
| Engine: | Two stroke, transverse three cylinder, | Four stroke, forward inclined single cylinder, DOHC, 4 valve |
| Capacity: | 249 cc / 15.2 cu-in | 124.7 |
| Bore x Stroke: | 45 x 52.3mm | 52 x 58.6 mm |
| Cooling System: | Air cooled | LLiquid cooled |
| Compression Ratio: | 7,3:1 | 11.2:1 |
| Induction: | 3x Mikuni VM22SC, Ø 22 mm carburetor | Fuel injection |
| Ignition: | Battery and coil | TCI |
| Starting: | Kick | Electric |
| Max Power: | 32 hp / 23.8 kW @ 8 500 rpm | 10.9 kW / 15 hp @ 9000 rpm |
| Max Torque: | 2.54 m-kg / 18.3 lb-ft @ 7 000 rpm | 12.2 Nm / 1.24 kgf-m @ 6000 rpm |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Frame: | Double tubular steel cradle | Steel double cradle |
| Front Suspension: | Telescopic hydraulic forks | Telescopic fork |
| Rear Suspension: | Dual shocks, Swing arm | Swinging arm link suspension |
| Front Brakes: | 180mm Drum | Single 248mm disc |
| Rear Brakes: | 180mm Drum | Single 220mm disc |
| Front Tyre: | 3.00 -18 | 80/90-21 |
| Rear Tyre: | 3.25 -18 | 110/80-18 |
| Rake: | 28° | 27° |
| Trail: | 110 mm / 4.3 in | 107 mm / 4.2 in |
| Wheelbase: | 1585 mm / 62.4 in | 1430 mm / 56.3 in |
| Wet Weight: | 160 kg / 348 lbs | 133 kg / 293.2 lbs |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 8.5 Litres / 2..2 US gal |