Kawasaki GPz 400S (1986-87) vs Kawasaki GPz 550 / Z 550GP (1984) vs Kawasaki KH 125FX (1982)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki |
| Model: | GPz 400S | GPz 550 / Z 550GP | KH 125FX |
| Years: | 1986-87 | 1984 | 1982 |
| Engine: | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. | Two stroke, single cylinder, |
| Capacity: | 399 cc / 24.3 cu-in | 553 cc / 33.7 cu-in | 124 cc / 7.6 cu-in |
| Bore x Stroke: | 70 x 51 mm | 58 x 52.4 mm | 56 x 50.6 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 10.7:1 | 10.0:1 | 7.0:1 |
| Induction: | 4x Kelhin CVM30 carburetors | 4x 22mm Teikei constant vacuum - main jets #94 | |
| Max Power: | 50 hp / 36.5 kW @ 10500 rpm | 65 hp / 47.4 Nm @ 9000 rpm | |
| Max Torque: | 3.6 kgf-m / 26 lb-ft @ 9000 rpm | 35.5 lb-ft / 48.1 Nm @ 8000 rpm | |
| Final Drive: | Chain | #530 O-ring chain | Chain |
| Front Suspension: | Telescopic forks | Telescopic forks | |
| Rear Suspension: | Swing arm | Dual shocks, Swinging arm | |
| Front Brakes: | Single disc | 2X 260mm disc | Single disc |
| Rear Brakes: | Single drum | Single 260mm disc | Drum |
| Front Tyre: | 100/90-16 | 3.25 H19 | 2.75-18 |
| Rear Tyre: | 120/90-16 | 3.75 H18 | 3.00 -18 |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 15 Litres / 3.9 US gal | 11.6 Litres |