A motorcycle includes a front wheel drive train that supplies power to a front wheel and a rear wheel drive train that supplies power to a rear wheel. In a case wherein the relation of Ps<Pbw is satisfied, the relation between the asymmetry value, \u03b2 value, and main power Pw includes substantial linearity. The lift link 24 is arranged to be vertically extended upward where the lift link 24 is pivotally connected to a point C, and is pivotally connected to the arm 21 at a point F.