Kawasaki GPZ 900 R

The Kawasaki GPZ 900 R is a motorcycle of the Japanese manufacturer Kawasaki. The Sports Tourer was sold from 1984 (model A1) to 1993 (Model A10) in Germany. In Japan, the car was developed by the year 2003 ( A16 ).

The successor was from the year 1986, the Kawasaki GPZ 1000 RX, which has often been criticized for being too heavy and unwieldy. The GPZ 900 R of 1985 (model A2) was also shown in the U.S. action film Top Gun.



  • Engine: in-line 4 - cylinder, 4-stroke
  • Valves per cylinder: 4, DOHC
  • Displacement: 908 cm3
  • Power: 34-115 hp at 9500 rpm
  • Torque: 85 Nm at 8500 rpm ( for 100 hp variant)
  • Maximum speed: 248 km / h
  • Cooling System: Liquid cooled
  • Tank capacity: 22 liters of regular gasoline
  • Gears: 6, constantly engaged
  • Empty weight (dry): 228 kg
  • Curb weight according to vehicle registration certificate: 254 kg, model 1984

New developments

  • External timing chain: For the first time in a motorcycle came an " external timing chain " used. In the motor it was a completely new design of the Kawasaki engineers. Until now, it was customary to have lost the timing chain for the valve train between the second and third cylinders in a four- cylinder in-line engine for motorcycles. This, however there are different lengths and shapes of the individual intake and exhaust ports. By shifting the timing chain all the way to the outside, were obtained for the motor of the GPZ 900 R for each of the four cylinders identical inlet and outlet ports. The synchronous inlet and outlet structure on the carburetor and manifold the power of the 908 cc engine could be increased considerably. There were also disadvantages of the new timing chain position. The engine built by a broad and secure the appearance at that time was very chaotic. From the left side of the motorcycle could be seen no more cylinders, but only the outline of the timing chain progression. The position of the timing chain is still used today in nearly all series cylinder engines for motorcycles.
  • Intermediate support rear swingarm first time in a motorcycle Kawasaki GPZ 900 R used in a centrally mounted rear swingarm. The rear swing arm is so centrally mounted in the frame and not as hitherto usual, on both outer sides. In addition, the swing arm rear suspension is connected to the base plates of the footrest to the frame in order to achieve the necessary stiffness. The advantage of this storage swingarm was that an endless chain could be fitted to the motorcycle without removing the rear swingarm. It only had to be dismantled the left footrest.
  • It is in the engine even at the first series-built, liquid-cooled 16 -valve engine in a motorcycle.
  • Eccentric on the rear swing arm: the first time was 900 R, the rear axle is not directly bolted to the GPZ with the rear swing arm, but separate eccentrics, who were in turn stored in the swingarm. The advantage of this eccentric was that a change of the tension of the chain could not be performed without releasing the rear axle. This type of Hinterachsenverschraubung came in many motorcycles Kawasaki used and also in other motorcycles such as of the YB6 BIMOTA