Calibration runs: We did several runs when
the bike was first put on the dyno. The run below - Run007 was determined
to be the 'average' of these runs. The runs we used did not vary by more
than instrument accuracy (less than 1HP) at engine speeds > 5.5 k, and
less than 1.5HP below 5.5 k.
Figure 1, Calibration (Standard) Run
As can be seen by the plot above - the K100
engine exhibits a remarkably flat torque curve. The peak HP shown of 73
seems about right since it is 'rear-wheel' horsepower, and considering the
transmission losses in the tranny and rear drive it would indicate approximately
90HP at the engine.
Air filter with approx. 15 k miles on it
Timing at 30 degrees full advance at 6 k RPM
Sunoco Ultra, 94 octane
Conclusions: Engine is running within
expected parameters. The lack of fine wiggles near the top end of the HP
curve indicates that mixture is not overly lean. DynoJet claims that the
fine wiggles will appear on engines that are running lean.