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Kawasaki GPz 750 / Z 750GP

Make Model	Kawasaki GPz 750 / Z 750GP
Year	1981
Engine	Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder
Capacity	738 cc / 45.0 cu-in
Bore x Stroke	66 х 54 mm
Cooling System	Air cooled
Compression Ratio	9.5:1
Induction	4x 36mm Mikuni carburetors
Ignition	Digital
Starting	Electric
Max Power	78.hp / 57 kW @ 9500 rpm
Max Torque	6.0 kgf-m / 43.3 lb-ft @ 7000 rpm
Transmission	5 Speed
Final Drive	Chain
Front Suspension	36mm Air assisted forks
Front Wheel Travel	150 mm / 5.9 in
Rear Suspension	Dual shocks spring preload and rebound damping adjustable
Rear Wheel Travel	112 mm / 4.4 in
Front Brakes	2x 260mm discs
Rear Brakes	Single 260mm disc
Front Tyre	100/90 -19
Rear Tyre	130/90 -16
Rake	28°
Trail	100 mm/ 3.9 in
Wheelbase	1500 mm / 59 in
Seat Height	780 mm / 31 in
Dry Weight	217 kg / 478.5 lbs
Wet Weight	230 kg / 506 lbs
Fuel Capacity	24.5 Litres / 5.8 US gal
Consumption Average	45.7 mpg
Standing ¼ Mile	12.2 sec / 107 mph
Top Speed	217 km/h / 135 mph
Road Test	Cycle 1982

The Kawasaki GPz750 was a sport bike introduced by Kawasaki in 1981/1982. It was more than a warmed-over KZ750, as it was improved in many areas, focusing on high-performance. Changes started at the front, with tapered bearings in the steering head instead of the KZ750's ball bearings, and the upper triple clamp was changed also, giving the GPz solid aluminum clip-on handle grips instead of the traditional handlebar. A bikini fairing almost identical to the one on the GPz550 was added too.

The GPz750 boasted increased power, with slightly higher compression, and camshafts designed to get the valves to full lift quicker, and fitting Mikuni 34mm carburetors to it for smoother airflow. The cylinder heads were also given a new combustion chamber with a 'squish zone' and porting & polishing from the factory. To maintain reliability oil passages were installed under the pistons for increased cooling, and an oil-cooler was added. The GPz750 was the quickest factory 750, as Cycle World recorded a time of 11.93 seconds at 109.62 mph (176.42 km/h) in the 1/4 mile.

The GPz750 underwent some significant changes in 1983. The original was based on the 1981 KZ750-E. Kawasaki retired the KZ750 after 1983. The 1983 KZ750L3 was nearly identical to the '82 GPz750, but with different colors, no bikini fairing, and without the porting & polishing in the cylinder head.

In 1983, the engine was modified further, mostly in the combustion chamber, and an all-new frame was used with Uni-Trak suspension. There were also modifications to the suspension, brakes and wheels, as well as the bodywork. The bike became more sport-oriented, but lost some of the versatility of the '82.