Kawasaki GPZ400R (1985)

The Kawasaki GPz 400R or ZX 400 was a motorcycle produced in 1985. It had a liquid-cooled, four-stroke, transverse four-cylinder engine with a capacity of 399cc and a compression ratio of 11.5:1. The induction system included 4 Keihin CVKD30 carburetors and an ignition system with CDI. The bike had an electric starter and could produce a maximum power of 59 hp at 12000 rpm and torque of 3.6 kgf-m at 10500 rpm. The clutch was a wet multi-disc type, and the transmission had six gears with a final drive by chain. The aluminum diamond tubular, double-cradle frame was used with a rising rate monoshock for the rear suspension and telescopic forks at the front. The braking system included a dual-disc system at the front and a single disc with a piston caliper at the rear. The GPz 400R had a wheelbase of 1395 mm, a dry weight of 176 kg, and a fuel tank capacity of 16 litres. The front tire was 100/90-16, and the rear was 130/90-16. The rake was set at 24 degrees, and the trail at 87mm or 3.4 inches. The seat height was 770 mm or 30.3 inches. Overall, the Kawasaki GPz 400R was a high-performance bike with remarkable handling, acceleration, and braking, making it a popular racing and touring motorcycle.

Technical specifications:

Make Model: Kawasaki GPz 400R / ZX 400

Year: 1985
Engine: Four stroke, transverse four cylinder, DOHC, 4 Valve per cylinder.
Capacity: 399 cc / 24.3 cu-in
Bore x Stroke: 57 39 mm
Cooling System: Liquid cooled
Compression Ratio: 11.5:1
Induction: 4x Keihin CVKD30 carburetors
Ignition: CDI
Starting: Electric
Max Power: 59 hp / 44 kW @ 12000 rpm
Max Torque: 3.6 kgf-m / 26.0 lb-ft @ 10500 rpm
Clutch: Wet multi disc
Transmission: 6 Speed
Final Drive: Chain
Gear Ratio: 1st 2,571 2nd 1,777 3rd 1,38 4th 1,125 5th 0,961 6th 0,851
Frame: Aluminum diamond tubular, double cradle
Secondary Reduction Ratio: 2.933 (44/15)
Total Reduction Ratio: (6-speed) 7.154
Front Suspension: 41mm Telescopic forks
Rear Suspension: Rising rate monoshock
Front Brakes: 2x 300mm discs 4 piston calipers
Rear Brakes: Single 240mm disc 1 piston caliper
Front Tyre: 100/90-16
Rear Tyre: 130/90-16
Rake: 24 degrees
Trail: 87mm / 3.4 in
Wheelbase: 1395 mm / 54.9 in
Seat Height: 770 mm / 30.3 in
Dry Weight: 176 kg / 388 lbs
Fuel Capacity: 16 Litres / 4.2 US gal