Kawasaki ZX1100 A-2 / A-3

From CycleChaos
Jump to navigation Jump to search
Kawasaki ZX1100 A-2 / A-3
Production 1984 - 85
Class Sportbike
Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.
Compression ratio 8.9:1
Ignition Battery powered inductive magnetically triggered.
Transmission 5 Speed
Suspension Front: 37mm Kayaba hydraulically activated air drive abutments for air pressure
Rear: Single air assisted shock adjustable for reload damping
Brakes Front: 2x 236mm discs 1 piston calipers
Rear: Single 236mm disc1 caliper
Front Tire 110/90 V18
Rear Tire 130/90 V17
Weight 244 kg / 538 lbs (dry), 261 kg / 574.5 lbs (wet)
Recommended Oil K-tech 10W-40
Fuel Capacity 20 Liters / 5.2 US gal
Manuals Service Manual


The engine was a Air cooled cooled Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.. The engine featured a 8.9:1 compression ratio.


It came with a 110/90 V18 front tire and a 130/90 V17 rear tire. Stopping was achieved via 2x 236mm discs 1 piston calipers in the front and a Single 236mm disc1 caliper in the rear. The front suspension was a 37mm Kayaba hydraulically activated air drive abutments for air pressure while the rear was equipped with a Single air assisted shock adjustable for reload damping. The ZX1100 A-2 / A-3 was fitted with a 20 Liters / 5.2 US gal fuel tank. The bike weighed just 244 kg / 538 lbs.


Kawasaki ZX1100 A-2 / A-3 Kawasaki ZX1100 A-2 / A-3


Kawasaki GPz 1100

Model History The 1981 GPz1100 was the first 1,100 cc motorcycle released by Kawasaki. It was officially marketed as the GPz1100 B1. Its frame design was a typical cradle design and the engine was based on the earlier Mk2 engines of the z1000H and z1000J, but the engine capacity was increased to 1,089 cc. Rather than featuring carburetors, the B1 was fitted with electronic fuel injection (EFI) as used on the earlier 1980 Z1000G/H models. The key cosmetic change was the paint scheme and the return to a painted black engine similar to the original Z1 released in 1973. Suspension and braking was similar to earlier models; the front forks featured 38 mm tubes, the frame design, based on the z1000H and J models was made from larger diameter steel in the section between the steering head to rear of the tank. To reduce weight, the tube walls were thinner. It weighed 255 kg (562 lb) with a full tank of fuel, and the power output was claimed to be 108 bhp (81 kW) The B1 was followed the following year by the GPz1100 B2; the B2 featured a cockpit fairing, the use of LCD warning lights and improved engine coating using a black chrome finish instead of the previous black paint. Kawasaki was serious about having the best Superbike, and the B2 was changed in several significant ways over its predecessor. The engine output was increased by increasing the valve lift from 8.3 mm to 8.7 mm, and valve duration was increased from 280 degrees to 288 degrees to boost upper-end horsepower. The early BOSCH-type analog fuel injection was scrapped, and a new digital fuel injection (DFI) was used in its place. The new system did not use the 'flapper' to measure airflow, but a digital microprocessor, a series of sensors, and a throttle position sensor to meter the fuel much more accurately, eliminate throttle lag, and decrease emissions. The suspension calibration was all-new for 1982, to make the big GPz an even better handler both on the track and on the street. The fork had slightly stiffer springs, and compression and rebound damping were increased approximately 10%. In the rear, the Kayaba shocks used the same springs, but with greater pre-load, and the compression damping was effectively doubled. And each of the rebound adjustments offered 30% more damping than its '81 counterpart. Wider, Dunlop K300 tires replaced the Bridgestone tires used on the B1 to improve handling and steering response. The B2 was also offered in a gold color finish called "Sonic Gold". The B1 and B2 were the last of the large-capacity dual-shock motorcycles from Kawasaki.

In 1983 a new GPz1100 design was released that featured Unitrack single suspension, anti-dive units on the forks and a major styling overhaul often called the "swish" look. Known as the ZX1100A1 model, the 1983 model featured a larger fairing (with a lower fairing section as an option to give a full race fairing), different instrumentation and a warning panel mounted on the redesigned petrol tank. This model contained many features that were to appear on the GPz900R model leading to the suspicion that it was used to test the acceptability of newer technology such as Unitrack and Anti-Dive forks and the newer styling. The 1983 model featured the same EFI design with a few small modifications, such as the inclusion of a warning light that flashed service codes when the DFI system was having a problem, a rev-limiter, and a 'limp' mode that would allow the engine to keep running if one of the sensors failed. The engine design changed in the 1983 model to use underbucket shims similar to the z650 and the camshaft duration was increased from 288 degrees to 300 degrees, and the valve lift increased from 8.7mm to 9.5mm. To flow more air, the head was revised extensively from the earlier model, featuring new ports, a 'bathtub' combustion chamber borrowed from their own S2 racer, and a 1mm larger intake valve recessed into the head slightly for valve clearance. The power output was now claimed to be 120 bhp (89 kW) at 8,750 rpm.[2] CYCLE magazine recorded 104 rear-wheel horsepower on their dynamometer, and Kawasaki was hoping to have a solid 10-second quarter-mile machine, but the increase in power at the upper RPM ranges lowered the torque at lower RPM's, so taking advantage of that power anywhere but on a racetrack was difficult. This model was released in a Red paint scheme with Blue and Silver stripes. Fundamentally the engine was still the same as earlier air-cooled engines. 1984 ZX1100-A2 The 1984 model deviated little from the 1983 model but featured a new paint scheme called "Galaxy Silver"; the original Firecracker Red scheme was still available. Revisions were minor and include a revised exhaust system and the addition of panels under the instrument cluster. Sales were now in direct competiotion to the smaller, lighter, water-cooled GPz900R model, which by the end of 1984 would win first, second and third place in the Isle of Man TT races. 1985 ZX1100-A3 In 1985 the last GPz1100 was released, competition from sales of the GPz900R released in 1984 had surpassed the GPz1100, so the 1100 was discontinued. All specifications from previous models were retained. This was also the final year for the GPz750 Turbo, which used much of the technology from this series of motorcycles. Later models Main article: Kawasaki GPZ1100 Sport Touring In 1995, Kawasaki re-released the GPz brand, basing the motor on the ZX-9R/ZX-10/ZX-11/ZZR-1100 water-cooled engines. There is no similarity between the later models (officially designated as ZX1100E) and any earlier models. This carbureted model was available from 1995 through 1997 in red or black and some came with rare factory ABS and/or saddlebags options. Source Wikipedia

Make Model Kawasaki GPz 1100 / ZX1100 A-2 / A-3
Year 1984 - 85
Engine Type Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.
Displacement 1089 cc / 66.4 cu-in
Bore X Stroke 72.5 x 66 mm
Cooling System Air cooled
Compression 8.9:1
Induction Digital fuel injection
Ignition Battery powered inductive magnetically triggered.
Starting Electric
Max Power 120 hp / 87.6 kW @ 8750 rpm
Max Torque 10.2 kgf-m / 73.7 lb-ft @ 7000 rpm
Transmission 5 Speed
Final Drive Chain
Front Suspension 37mm Kayaba hydraulically activated air drive abutments for air pressure
Front Wheel Travel 150 mm / 5.9 in
Rear Suspension Single air assisted shock adjustable for reload damping
Rear Wheel Travel 109 mm / 4.3 in
Front Brakes 2x 236mm discs 1 piston calipers
Rear Brakes Single 236mm disc1 caliper
Front Tire 110/90 V18
Rear Tire 130/90 V17
Dry Weight 244 kg / 538 lbs
Wet Weight 261 kg / 574.5 lbs
Fuel Capacity 20 Liters / 5.2 US gal
Standing ¼ Mile 11.0 sec / 123.5 mph
Road Test Honda CB1100RC-Kawasaki GPZ-Suzuki Katana 1983 Motosprint