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To take up from previous discussions, the handling of a vehicle whether car, motorcycle, or bicycle is a function of weight distribution, steering geometry, aerodynamic forces. The blending and balancing of the forces is what we, as designers, strive to achieve for a given application. A low nose and a high tail are general terms that should be quantified and considered with respect to weight distribution. A rider's center of mass is usually just above the belt but back angle on a bike can moves the CG forward and aft. A scooter's CG is typically lower and further aft than a sport bike. Trail and head angle are set to give the desired responses. Adding a full fairing affects the setup with fin area applying forces at the center of pressure, the point where the net affect is applied.
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