Here's a scanned print-out of a run of my '93 ZZ-R, made on the DynoJet testbench.

Three run's were being made:
1) The red line
A run through all the gears (starting in second). Measured is a maximum horsepower of 130 at the rear wheel. This was reached in third gear. Allowing 15% hp loss in the transmission (which is a point of debate), this means a max horsepower of 149.5 at the crankshaft.
When changing gears there is a noticable dip in the hp output. This seems to be typical for all Kawasaki's. It's a result of a lean carburetor setting. When corrected (with e.g. a DynoJet kit) the driver will experience a more willing machine when accellerating rapidly.
In gear #6 the machine reached a topspeed of about 275 kmh. What we have to keep in mind is that the ZZ-R couldn't take advantage of it's Ram Air Intake system. Kawasaki claims an additional 5 hp at topspeed with it.
2) The green line
A run in fourth gear, from low to max rpm. Here we can see the nice build up of power without a dip that's worth mentioning.
3) The blue line
A second gear run. First the tester went to max rpm. Then he closed the throttle and immediately opened it again full. Here we see again the sharp drop in power when opening the throttle.


A conclusion that can be drawn from this mistreatment of my bike is that, all in all, it's quite a decent output of power. It can be slightly better, but the question is, will the removal of dips be noticable?

Want to see more DynoJet run's of other bikes? (GPX750, CBR1000, GSXR1100, etc)

Jeroen de Roos, Eindhoven, The Netherlands
Comments to: jdr@iaehv.nl