All terrain vehicle

Abstract

An all-terrain vehicle including a frame having longitudinally-spaced ends defining a first longitudinal axis, and an engine supported by the frame. The engine includes a crankshaft defining a second longitudinal axis substantially parallel to the first longitudinal axis.

What is claimed is: 
     
         1 . An all-terrain vehicle including:
 a frame including longitudinally spaced-apart ends defining a first longitudinal axis;   a plurality of wheels operably coupled to the frame;   an engine supported by the frame, the engine including at least one cylinder and a crankshaft driven by the at least one cylinder, the crankshaft defining a second longitudinal axis, the second longitudinal axis being substantially parallel to the first longitudinal axis; and   wherein the engine includes a cross-sectional profile configured to be received within a perimeter defining trapezoid having a height of approximately 432 millimeters, an upper width of approximately 229 millimeters, and a lower width of approximately 432 millimeters.   
     
     
         2 . The all-terrain vehicle of  claim 1 , further comprising a transmission operably coupled to the engine and configured to transmit power to a front transmission shaft for driving a pair of front wheels in motion and to transmit power to a rear transmission shaft for driving a pair of rear wheels in motion, the front transmission shaft laterally spaced from, and extending parallel to, the rear transmission shaft. 
     
     
         3 . The all-terrain vehicle of  claim 1 , wherein the trapezoid defines a center portion supporting a straddle-type seat. 
     
     
         4 . The all-terrain vehicle of  claim 1 , further comprising a transmission operably coupled to the engine, the transmission including a cross-sectional profile configured to be received within the perimeter defining trapezoid.