The 750 turbo (ZX750E1) was released in 1984, alongside the all-new GPz900R. Although carrying GPz badges on the engine covers, it was only referred to by Kawasaki as the "750 turbo" - the GPz tag wasn't mentioned. Development started in January 1981 as a turbocharged 650, then as a 750 from November 1981.When finally released, the stock bike made a claimed 112 hp, had sports bike handling (for the day) and looked good - especially next to the other factory turbos which were already on the market - the Suzuki XN85, Honda CX500 and 650 turbos, and the Yamaha XJ650 turbo. Performance was on a par with the GPz1100,  at around 11.2 secs at 125mph for the quarter mile and 148mph flat out. One magazine even branded it the fastest bike they had ever tested, and Kawasaki ran some ads claiming it to be "The Fastest Production Motorcycle in the World". Jay "PeeWee" Gleason also famously recorded a 10.71 quarter for Kawasaki to show that the turbo had genuine performance and was ahead of the other factory turbos. Around 5500 E1 units were made, and approx 2500 1985 E2 models, which were identical except for twin throttle cables, and minor changes like brake caliper decals.

This 1982 pre-production prototype was exhibited at the Tokyo Show, alongside the XN85 Suzuki turbo. The fairing was formed from sheet aluminium. Note the wing on the upper fairing, the absence of a lower fairing, and the dymag-style wheels.

More pics of this bike courtesy of Frans van de Laar. Thank you Frans. Click on pics for a bigger image.

The following info is from the workshop manual supplement.

Overall Dimensions

Overall Length	2220mm
Overall Width	740mm
Overall height	1260mm
Wheelbase	1490mm
Ground Clearance	155mm
Seat Height	780mm
Dry Weight	233kg (512lbs)
Fuel Tank Capacity	17 litres
Braking Distance	12.5 metres from 50km/h
Turning Radius	2.7m

 Engine

Type	4-stroke, DOHC, 4-cylinder
Cooling system	Air cooled
Bore and stroke	66 x 54mm
Displacement	738cc
Compression Ratio	7.8:1
Maximum horsepower	82.4kw (112 PS)
Maximum torque	99.1Nm (73.1ft-lb) @ 6500rpm
Ignition timing	10 degrees BTDC @ 1050rpm to 30 degrees BTDC @ 3300rpm
Spark plug	BR9EV
Valve timing Inlet	Open 22 degrees BTDC Close 52 degrees ABDC Duration 254 degrees
Valve timing Exhaust	Open 60 degrees BBDC Close 20 degrees ATDC Duration 260 degrees
Oil capacity	3.5 litres
Primary reduction ratio	1.935
Gear Ratios	1st 2.285, 2nd 1.647, 3rd 1.272, 4th 1.045, 5th 0.833
Overall drive ratio	4.946 (in top gear)

Frame / Electrical

Rake	28 degrees
Front tyre	110/90 V 18
Rear tyre	130/80 V 18
Front fork travel	130mm
Rear wheel travel	105mm
Battery	12V 18ah
Alternator output	20A @ 8000 rpm
Tyre Pressures US and Canada	Front 28psi, Rear 32-36psi
Tyre Pressures Rest of world	Front 32psi, rear 41psi
Front fork air pressure	5.7 - 8.5psi
Rear shock air pressure	7.1 - 43psi, 28 recommended