Kawasaki ZX750A

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Kawasaki GPZ750
Also called GPZ750R, GPZ 750 R, GPZ 750
Production 1983 - 1988
Class Sport bike
Predecessor Kawasaki KZ750E
in-line four, four-stroke
Bore / Stroke 66.0mm x 54.0mm
Compression ratio 9.5:1
Top Speed 134 mph (216 km/h)[1]
1/4 mile 11.93 seconds at 109.62 mph (176.42 km/h)[1]
Horsepower 85.15 HP (63.5 KW) @ 9500RPM
Torque 42.78 ft/lbs (58.0 Nm) @ 7000RPM
Fuel System 4 X Mikuni Carbs
Spark Plug NGK B9ES '83-85
Battery YUASA SYB14L-A2 '83-85
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: Wet multi-discs
Final Drive Chain: 630x94
Front Sprocket 15T
Rear Sprocket 38T
Suspension Front: Air Assisted Forks
Rear: Dual Shocks
Brakes Front: dual disc
Rear: single disc
Front Tire 110/90-18
Rear Tire 130/90-18
Wheelbase 59.09 inches (1501 mm)
Seat Height 30.71 inches (780 mm)
Weight 241.0 kg (wet)
Oil Filter K&N KN-401[2]
Recommended Oil K-tech 10W-40
Fuel Capacity 4.76 Gallon (18.00 Liters)
Related Kawasaki KZ750R
Manuals Service Manual

Brochures ·

The Kawasaki GPZ750 was a in-line four, four-stroke Sport touring motorcycle produced by Kawasaki between 1983 and 1985. It could reach a top speed of 134 mph (216 km/h). Max torque was 42.78 ft/lbs (58.0 Nm) @ 7000 RPM. Claimed horsepower was 85.15 HP (63.5 KW) @ 9500 RPM.

Overview[edit | edit source]

The Kawasaki GPZ750 was introduced in 1982, and then underwent some significant changes in 1983. The original was based on the 1981 KZ750, which was the quickest machine of that year. For 1982 changes included new carbs, cams and mufflers. In 1983, the engine was modified further, mostly in the combustion chamber, and an all new frame was utilized with uni-track suspension. There were also modifications to the suspension, brakes and wheels, as well as the bodywork. The bike become more sport oriented, but lost some of the versatility of the '82. Power in '83 was 85 bhp @9500 rpm, wet weight was 515 lb (234 kg)'s.

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.

  • 1982 - First Year of Manufacture. Bikini Style Headlight Only
  • 1983 and 1984 - Second and third years of manufacture. Full sized upper fairing (half-faired version)

Engine[edit | edit source]

The engine was a air cooled in-line four, four-stroke. A 66.0mm bore x 54.0mm stroke result in a displacement of just 739.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive[edit | edit source]

The bike has a 5-speed transmission. Power was moderated via the Wet multi-discs.

Chassis[edit | edit source]

It came with a 110/90-18 front tire and a 130/90-18 rear tire. Stopping was achieved via dual disc in the front and a single disc in the rear. The front suspension was a Air Assisted Forks while the rear was equipped with a Dual Shocks. The GPZ750 was fitted with a 4.76 Gallon (18.00 Liters) fuel tank. The wheelbase was 59.09 inches (1501 mm) long.

1983[edit | edit source]

High grade sports multi. Fairing, front and rear disc brakes, cast wheels, air adjustable and anti-dive equipment front fork, uni-trak with air and damping force adjustable rear shock abosrber, eccentric-cam chain adjuster, LCD fuel gauge and Warner unit, black chrome plated mufflers. Electric starter, transistorized ignition system with electronically advanced.

  • 738 mL
  • Four-stroke, 4 Cylinder, Dual Over Heed Camshaft
  • 5-Speed, Return Shift
  • Color
    • Fuel Tank: Firecracker Red, Polar White
    • Front Fender: Same as Fuel Tank
  • Engine No: KZ750EE110001 -
  • Frame No: IX750A-000001 -
    • (Canada)(US) JKAZXDAl()DA00000l -
  • Parts Catalog No: 99917-1017-02 (Microfiche),
  • Service Manual No: Same as KZ700-A1
  • Owner's Manual No: 99922-1215-02
    • (Canada)(US) 99920-1188-01 (West Germany) 99923-1 058-01

1984[edit | edit source]

1984 Kawasaki ZX750 GPZ ZX750-A2

  • Color
    • Fuel Tank: Firecracker Red, Galaxy Silver
    • Front Fender: Same as FueL Tank
  • Engine No: KZ750EE128101 -
  • Frame No: ZXJ50A-018001 -
    • (Canada)(US) JKAZXDA1()EA018001 - ((Japan)Mfr.)
  • JKAZXDA1()EB500001 - ((US) Mfr.)
  • Parts Catalog No: Same as ZX750-A1
  • Service Manual No: Same as KZJ00-A1
  • Owner's Manual Na: 99922-1282-03
    • (Canada)(US) 99920-1233-02 (West Germany) 99923-1101-01
  • Changes: Color and graphic

1985[edit | edit source]

1985 Kawasaki ZX750 GPZ ZX750-A3

  • Color
    • Fuel Tank: Firecracker Red, Galaxy Silver, Ebony
    • Front Fender: Same as Fuel Tank
  • Engine No: KZ750EE145001 -
  • Frame No: ZX750A-025501 -
    • (Canada)(US) JKAZXDA1()FA025501 - ((Japan)Mfr.)
  • JKAZXDA1()FB504101 - ((US)Mfr.)
  • Parts Catalog No: 99961-0186 (Microfiche),
    • (Europe) 99917-1135-01 (Microfiche),
    • (Other) 99917-1134-01 {Micro)
  • Service Manual No: Same as KZ700-A1
  • Owner's Manual No: 99922-1318-01
    • (Canada)(US) 99920-1274-01 (West Germany) 99923-1125-01
  • Changes: Color and graphic, full fairing.

Photos[edit | edit source]

Kawasaki GPz750

Make Model Kawasaki GPz 750 / Z 750GP
Year 1981
Engine Type Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder
Displacement 738 cc / 45.0 cu-in
Bore X Stroke 66 х 54 mm
Cooling System Air cooled
Compression 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 Tire 100/90 -19
Rear Tire 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 Liters / 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

In Media[edit | edit source]

References[edit | edit source]

  1. 1.0 1.1 "Cycle World", 1982.
  2. 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.