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Kawasaki GPz 750 / Z 750GP

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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
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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.