Specifications of the ZX-12R


Here you'll find the specifications of the ZX-12R. I've gotten these from several sources. If you want to know exactly what the specs are you'd better contact your Kawasaki dealer.

Type Liquid-cooled, DOHC, 4-stroke, 4-cylinder, 16-valve
Displacement (cm3) 1,198
Bore and Stroke (mm) 83.0 × 55.4
Compression Ratio 11.0:1
Maximum horsepower 131kW(178PS)/10,500rpm
Maximum torque 134N·m(13.66kgf-m)/7,500rpm
Ignition system Digital
Lubrication system Forced, wet sump
Starting system Electric
Carburator type Electric Fuel Injection
Transmission type 6-speed constant mesh return shaft
Clutch type Wet multi disc
Final drive system Chain
Gear ratio 1st 2.428(34/14)
2nd 1.823(31/17)
3rd 1.440(36/25)
4th 1.250(30/24)
5th 1.130(26/23)
6th 1.033(31/30)
Primary reduction ratio 1.596(83/52)
Final reduction ratio 2.500(45/18)
Frame type Monocoque aluminium
Tire size Front 120/70-ZR17
Rear 200/50-ZR17
Brake type Front Dual disc
Rear Disc
Suspention type Front Telescopic
Rear Uni-track
Overall length (mm) 2,080
Overall width (mm) 725
Overall height (mm) 1,185
Seat height (mm) 810
Wheelbase (mm) 1,440
Road clearance (mm) 120
Dry weight (kg) 210
Fuel tank capacity (L) 20
Engine oil tank capacity (L) 4.0
Source: Kawasaki Japan

It's Fast

Daily News 12/2/99

In Rockingham, NC, Team Kawasaki Drag Race Champ Ricky Gadsen rode a stock, pre-production ZX-12R to a quarter-mile time of 9.52 seconds at 146.97 miles per hour. The ZX-12R was completely stock with Y2K specs, the only adjustments being a lowered front and rear end for better traction. The bike's as-run wheelbase checked in at 55.7 inches, which is only 0.8 inches than smaller the stock 56.5-inch wheelbase found on bikes that will be sold at dealers.

The ZX-12R reportedly turned in respectable eighth-mile times, but the real power hit in the top-end.

To prove that the run wasn't a fluke or just due to Gadsen's immense talent, Chip Ellis, one of Kawasaki's 600cc drag racers, climbed on the bike at the next meet in Gainsville, FL, and turned in a run of 9.57 seconds at 146.17 mph. Later, Muzzy put on one of their new ZX-12 pipes and the bike ran a time of 9.48 at 150.62 mph.

Hayabusas in the same class at Gainesville were reportedly running quarter-mile in the mid to high 9.7s.

The fuel injection system

Some pages from the Service Manual

Page 1: General Specifications 1
Page 2: General Specifications 2
Page 3: Seat
Page 4: Fairing
Page 5: Frame
Page 6: FI System wiring diagram 1
Page 7: FI System wiring diagram 2