BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 246

Section 05 TRANSMISSION SYSTEM
There are many dynamic considerations that affect this figure in the field. Drastic tem-perature
changes under the hood, pressure changes both under the hood and near the air box inlet, exhaust
system temperature changes, and even rotating parts such as clutches, jackshafts, and brake discs
causing air turbulence under the hood all affect where the engine peak power is when the engine
is doing its work under the hood.
Because of these uncontrollable circumstances, it is always best to try varying your clutch setup
200-300 RPM above and below the dyno specification. Most field testing has proven that 200-300
RPM below the dyno figure gives the most consistent overall performance.
Remember this when it is time to go out "fine tuning" your clutch setup and your gearing.
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