Due to the model complexity, the manual derivation of the equations of motion
of two-wheeled road vehicles is not practical, particularly if one wishes to
study complex modes of operation such as certain cornering phenomena. We
establish the feasibility of using multi-body model building software to study
the straight running properties of a motorcycle. Our results accurately match
those found by others using manual methods. Computer aided modeling techniques
are quicker to use, much more reliable and can tackle problems beyond the scope
of manual methods. Examples are given to demonstrate how these tools can reduce
the time and effort needed in improving motorcycle design. We begin be showing
how the stability properties of a motorcycle vary with speed. Next, we 
investigate the influence of the mechanical trail on stability. Finally, we 
implement a simple rider control mechanism to study the counter steering 
phenomenon