Several runs were taken with the standard mixture settings, and then a run with the altitude plug installed. The altitude plug has the effect of leaning the mixture of the bike by approximately 10%. A gas analyzer was used to determine the effect of the plug on the actual mixture.

Parameters: Run007
No altitude plug
Stock air filter with approx. 15 k miles on it
Timing at 30 degrees full advance at 6 k RPM (my timing mark)
Sunoco Ultra, 94 octane
CO reading at idle ~1% (while this is low - it did not concern me since I do not ride the bike at idle.)
CO reading at 3.5 k ~1.5% (this is usually accepted as the 'ideal' CO setting off idle)
Parameters: Run013
Altitude plug installed (-10% mixture)
Stock air filter with approx. 15 k miles on it
Timing at 30 degrees full advance at 6 k RPM (my timing mark)
Sunoco Ultra, 94 octane.
CO reading at idle ~0.5% (this is definitely low - a rough idle was the result)
CO reading at 3.5 k ~1.0%
Conclusion: Significant HP and torque loss can be observed over the entire range of RPMs when the high-altitude plug was installed (test was taken at approx. 10 feet above sea level). Mixture is not rich on this engine. Additional tests are indicated - and will be done when I can get to the dyno again - on richening the mixture.
DynoMain