1980 Kawasaki Z400GP

Make Model	Kawasaki Z 400J
Year	1980 - 93
Engine	Four stroke, transverse four cylinder, DOHC, 2 Valve per cylinder.
Capacity	399 cc / 24.3 cu-in
Bore x Stroke	52 х 47mm
Cooling System	Air cooled
Compression Ratio	9.5:1
Induction	4 x 21mm Teir-Kei carburetors
Ignition	CDI
Spark Plug	NGK D8EA or ND X24ES-U
Starting	Electric
Max Power	43 hp / 32 kW @ 10500 rpm
Max Torque	3.5 kgf-m / 25.3 lb-ft @ 8500 rpm
Transmission	6 Speed
Final Drive	Chain
Gear Ratio	1st 2.57 (36/14) 2nd 1.78 (32/18) 3rd 1.38 (29/21) 4th 1.13 (27/24) 5th 0.96 (25/26) 6th 0.85 (23/27)
Front Suspension	Leading axle telescopic forks
Rear Suspension	Pivoted fork adjustable damper
Front Brakes	Single 236mm disc
Rear Brakes	Single 140mm drum
Front Tyre	90/90-19
Rear Tyre	110/90-18
Dry Weight	179 kg / 394.6 lbs
Fuel Capacity	15 Litres / 3.9 US gal
Consumption Average	47 mpg
Standing ¼ Mile	13.6 sec
Top Speed	106 mph

The Kawasaki KZ400-J had an air-cooled four-cylinder, four-stroke, eight-valve DOHC engine, and six-speed gearbox derived from the larger Kawasaki Z500/Z550. The KZ400J was produced from 1980-1983. The "West Germany" version was limited to 25 kW. These bikes were electric start only, and the KZ400-J had a single (US model) or double (UK, Western Germany models) disc brake at the front, and a drum brake rear.

The 1980 model was identified as Kawasaki KZ400-J1, while in 1981 the Kawasaki KZ400-J2 was introduced with small differences, like a transistorised ignition system.

Kawasaki Z 400J