Kawasaki GPz 500S (1989-90)

The Kawasaki GPz 500S or EX 500R Ninja is a 1989-90 motorcycle equipped with a four-stroke, parallel twin-cylinder engine that has a capacity of 498 cc. It features liquid cooling, 10.8:1 compression ratio, wet sump lubrication, and a six-speed transmission with a final drive chain. The maximum power output is 60 hp or 43.7 kW at 9800 rpm, with a maximum torque of 46.1 Nm at 8500 rpm. The front suspension is 38mm telescopic forks with 130 mm wheel travel, while the rear suspension is swinging arm, single shock adjustable for spring preload with 100 mm wheel travel. The braking system includes a single 270mm disc 2 piston caliper at the front and a 160mm drum at the rear. The motorcycle has a length of 2110 mm, a width of 685 mm, and a height of 1160 mm, with a seat height of 770 mm. It has a dry weight of 170 kg and a wet weight of 200 kg, with a fuel capacity of 15.9 litres. The Kawasaki GPz 500S/EX 500R Ninja can reach a top speed of 197.9 km/h and achieve a standing 1/4 mile time of 12.5 seconds at 164.8 km/h.

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Technical specifications:

Make Model: Kawasaki GPz 500S / EX 500R Ninja

Year: 1989 – 90

Engine: Four stroke, parallel twin cylinders. DOHC, 4 valves per cylinder.

Capacity: 498 cc / 30.4 cu-in

Bore x Stroke: 74 x 58 mm

Cooling System: Liquid cooled,

Compression Ratio: 10.8:1

Lubrication: Wet sump

Engine Oil: Semi-Synthetic, 10W/40

Induction: 2x Keihin CVK34 carburetor

Ignition: TCI (Transistor Controlled Ignition)

Spark Plug: NGK, DR9EA

Starting: Electric

Max Power: 60 hp / 43.7 kW @ 9800 rpm

Max Power Rear Tyre: 54.7 hp @ 9500 rpm

Max Torque: 46.1 Nm / 4.7 kg-m @ 8500 rpm

Clutch: Wet, multiple discs, cable operated

Transmission: 6 Speed

Final Drive: Chain

Frame: Iron, Double cradle frame

Front Suspension: 38mm Telescopic forks

Front Wheel Travel: 130 mm / 5.1 in

Rear Suspension: Swinging arm, single shock adjustable for spring preload

Rear Wheel Travel: 100 mm / 3.9 in

Front Brakes: Single 270mm disc 2 piston caliper

Rear Brakes: 160mm drum

Front Tyre: 100/90-16

Rear Tyre: 120/90-16

Rake: 63 degrees

Trail: 91 mm / 3.5 in

Dimensions: Length 2110 mm / 83 in Width 685 mm / 27.0 in Height: 1160 mm / 45.6 in

Wheelbase: 1435 mm / 56.5 in

Seat Height: 770 mm / 30.0 in

Dry Weight: 170 kg / 370 lbs

Wet Weight: 200 kg / 441 lbs

Fuel Capacity: 15.9 Litres / 4.2 US gal

Consumption Average: 18.2 km/lit

Braking 60 – 0 / 100 – 0: 14.6 m / 39.9 n

Standing 1/4 Mile: 12.5 sec / 164.8 km/h

Top Speed: 197.9 km/h / 122.9 mph