Historical Summary

[Cletus]

more to come mate. thanks for the interest.

I was a bit stunned myself to learn that the GPz900 was supposed to be a six cylinder. Imagine if they'd released it! The perfect swapout engine for the ninja 250R.

[muzza.vn]

you could always try and wedge a z1300 motor in the 250r.lol.

[Cletus]

SSSHHHH they'll all be doing it.

Kawasaki GPz 750

Year: 1981

Engine: Air cooled, four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.

Capacity: 738cc
Bore x Stroke: 66 ? 54 mm
Compression Ratio: 9.5:1
Induction: 4x 36mm Mikuni
Max Power: 78.hp 57 KW @ 9500 rpm
Max Torque: 6.0 kg-m @ 7000 rpm
Transmission: 5 speed
Drive: chain
Front Suspension: 36mm Air assisted forks, 150mm wheel travel.
Rear Suspension: Dual shocks spring preload and rebound damping adjustable., 112mm wheel travel.
Front Brakes: 2x 260mm discs
Rear Brakes: Single 260mm disc
Front Tyre: 100/90 -19
Rear Tyre: 130/90 -16
Dry-Weight: 217 kg
Fuel Capacity: 24.5 Litres
Fuel Consumption: 45.7 mp/g
Standing ¼ Mile: 12.2 sec / 107 mp/h
Top Speed: 135 mp/h

[Cletus]

GPz 750 Turbo (ZX750-E1)
Year: 1983
Engine: Air-cooled, turbocharged, four-stroke, transverse four cylinder, DOHC, 2 valves per cylinder
Capacity: 738cc
Bore x Stroke: 66 x 54 mm
Compression Ratio : 7.8:1
Induction: Mikuni fuel injection
Ignition: Digital
Starting: electric
Max Power: 112 hp 82.4 KW @ 9000 rpm
Max Torque: 99.1Nm 73.1ft-lb @ 6500 rpm
Transmission: 5 Speed
Drive: chain
Front Suspension: 37mm air-adjustable forks, adjustable anti dive, 130mm wheel travel
Rear Suspension: Kawasaki Uni-Trak air-adjustable single shock, adjustable for rebound damping, 104mm wheel travel
Front Brakes: 2x 280mm discs
Rear Brakes: Single 270mm disc
Front Tyre: 110/90 V18
Rear Tyre: 130/80 V18
Dry-Weight: 233 kg
Wet-Weight: 243 kg
Fuel Capacity: 17 Litres
Standing ¼ Mile: 11.5 sec
Top Speed :136 mp/h





Overview Turbomotorcycles.org / Umgweb.com

- Kawasaki were the last of the four major Japanese manufacturers to release a turbo-charged motorcycle
- the only factory to achieve the turbo transformation of a medium-sized motorcycle
- The 750 turbo was the world's fastest production turbo motorcycle
- Honda, Suzuki and Yamaha produced 650cc turbo bikes, all 650cc and all withdrawn from the market.
- Kawasaki's 750 was bigger yet lighter.
- Kawasaki differed from the other manufacturers in the design and location of their turbo-charger unit.
- existing inline four cylinder engine Z750 with the turbo mounted in front of the cylinders close to the exhaust ports.
- in a space of 390mm 7.5in, four heat resistant steel pipes run from the ports to a collector and to a Hitachi turbo-charger.
- positioning reduced turbo lag significantly.
- digital fuel injection system measures and monitors engine speed, throttle opening, intake pressure and engine/air temp.
- chassis has integrated, aluminium frame member located between the frame's front down tubes for more rigidity
- sealed O-ring chain has special cut-outs in every other link to reduce weight and heat build-up.

[Cletus]

Kawasaki GPz 750R Ninja (ZX 750R)
Year: 1984
Engine: Liquid cooled, four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Capacity: 746cc
Bore x Stroke: 70 x 48.6 mm
Compression Ratio: 10.5:1
Induction: 4x 34mm Mikuni
Ignition: CDI
Starting: electric
Max Power: 92 hp 67.2 KW @ 10000 rpm
Transmission: 6 Speed
Drive: chain
Front Suspension: Air assisted forks, 160mm wheel travel.
Rear Suspension: Single shock swinging arm, 109mm wheel travel.
Front Brakes: 2x 270mm discs
Rear Brakes: Single 256mm disc
Front Tyre: 120/80-16
Rear Tyre: 130/80-18
Dry-Weight: 228 kg
Fuel Capacity: 22 Litres
Fuel Consumption: 36 mp/g
Standing ¼ Mile : 12.4 sec / 106 mp/h
Top Speed: 136 mp/h

[easyrider]

what a great resource for new comers to the kwaka brand! thanks cletus well done fella!!!

[Cletus]

Thanks mate. It's by no means complete and its other peoples work which I have just compiled and I recommend reading the other historical threads in this section to get a more complete picture. I know I am missing some very notable things namely a lot of meguro info but I'll attempt to add it as it comes to hand.

[easyrider]

keep at it mate,it will be good to have a quick reference if we need to know something.

[Davo65]

Thanks Cletus for the history lesson............way that 81 GPz is such a great looking bike. Given the chance it would be my Restore project

[muzza.vn]

i would love an 83 750 turbo to restore.