permits one wheel to revolve faster than the other one. This includes any type of gearing such as ring and pinion gearing, spiral gearing, hypoid gearing, worm gearing or the like. This also includes any types of viscous coupling.
In another preferred embodiment, the vehicle comprises a front drive shaft connected to a front end of the transmission shaft on one end and to a front differential on the other end to allow the power unit to transmit power to the pair of front wheels.
In another embodiment, the power is transmitted to either one of the front or rear pairs of wheels through a drive chain and sprocket arrangement.
In a preferred variant, the seat is pivotal connected to the frame, the seat being moveable between a first position wherebythe driver may drive the vehicle and a second position whereby the driver may access the power unit. The seat preferably comprises a pommel located at a front portion thereof and is most preferably removably connected to the frame.
As embodied and broadly described herein, the invention also provides a saddle-type vehicle comprising a frame, a pair of front wheels comprising first and second wheels suspended from a front portion of the frame, a pair of rear wheels comprising third and fourth wheels suspended from a rear portion of the frame, the first and second wheels defining a first transversal axis and the third and fourth wheels defining a second transversal axis, a power unit mounted on the frame, a transmission allowing the power unit to transmit power to