Kawasaki GPz 400S (1986-87) vs Kawasaki GPz 550 / Z 550GP (1984) vs Kawasaki KH 125FX (1982) vs Kawasaki BJ 250 Estrella RS (1995-99) vs Kawasaki GPz 550 / Z 550GP (1982) vs Kawasaki GPz 750R Ninja / ZX 750R (1986)

Comparison technical specifications

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Make:	Kawasaki	Kawasaki	Kawasaki	Kawasaki	Kawasaki	Kawasaki
Model:	GPz 400S	GPz 550 / Z 550GP	KH 125FX	BJ 250 Estrella RS	GPz 550 / Z 550GP	GPz 750R Ninja / ZX 750R
Years:	1986-87	1984	1982	1995-99	1982	1986
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,	Four stroke, single cylinder, SOHV , 2 valves	Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Capacity:	399 cc / 24.3 cu-in	553 cc / 33.7 cu-in	124 cc / 7.6 cu-in	249 cc / 15.2 cu-in	553 cc / 33.7 cu-in	746 cc / 45.6 cu-in
Bore x Stroke:	70 x 51 mm	58 x 52.4 mm	56 x 50.6 mm	66 X 63 mm	58 x 52.4 mm	70.0 x 48.6 mm
Cooling System:	Liquid cooled	Air cooled	Air cooled	Air cooled	Air cooled	Liquid cooled
Compression Ratio:	10.7:1	10.0:1	7.0:1	9.0:1	10.0:1	10.5:1
Induction:	4x Kelhin CVM30 carburetors	4x 22mm Teikei constant vacuum - main jets #94		Carburetor	4x 22mm Teikei constant vacuum - main jets #94	4x 34mm Mikuni carburetors
Max Power:	50 hp / 36.5 kW @ 10500 rpm	65 hp / 47.4 Nm @ 9000 rpm		20 hp / 14.9 kW @ 6000 rpm	58 hp / 42.3 Nm @ 9000 rpm	92 hp / 67.2 kW @ 10000 rpm
Max Torque:	3.6 kgf-m / 26 lb-ft @ 9000 rpm	35.5 lb-ft / 48.1 Nm @ 8000 rpm		21 Nm / 15.5 lb-ft @ 5000 rpm	35.5 lb-ft / 48.1 Nm @ 8000 rpm	7.2 kg-m / 52 lb-ft @ 8500 rpm
Final Drive:	Chain	#530 O-ring chain	Chain	Chain	#530 O-ring chain	Chain
Front Suspension:	Telescopic forks	Telescopic forks		Telescopic forks	Telescopic forks	Air assisted forks, 160mm wheel travel.
Rear Suspension:	Swing arm	Dual shocks, Swinging arm		Dual shocks	Dual shocks, Swinging arm	Single shock swinging arm, 109mm wheel travel.
Front Brakes:	Single disc	2X 260mm disc	Single disc	Single 300mm disc	2X 260mm disc	2x 270mm discs
Rear Brakes:	Single drum	Single 260mm disc	Drum	Single 230mm disc	Single 260mm disc	Single 256mm disc
Front Tyre:	100/90-16	3.25 H19	2.75-18	90/90-18 51 P	3.25 H19	120/80-16
Rear Tyre:	120/90-16	3.75 H18	3.00 -18	110/90-17 60 P	3.75 H18	130/80-18
Fuel Capacity:	15 Litres / 3.9 US gal	15 Litres / 3.9 US gal	11.6 Litres	14 Litres / 3.7 US gal	15 Litres / 3.9 US gal	22 Litres / 5.8 US gal