When the bike is standing still, and at an unwise lean angle, it weighs approximately 10 tons. Trust me on this; I know.
Very true, and here's the science behind it:
Motorcycles don't obey normal laws of mass and inertia. Einstein (or was it Frank N. Stein) said that mass increases with the square of the velocity, but we all know that the faster a Connie goes, the lighter it seems. Now, if acted upon by the relative anti-magnetic fields of an inverted non-Euclidian gamma-factored universe, we can readily see that a Concours at rest, with lean-induced quasi-inertial gravitic attraction (not canceled by spendicular thermofaction) can easily obtain
infinite mass.
And THAT is why you need tip-over bars.