Abstract: A motorcycle frame, an engine and transmission mounted on the frame, a drive sprocket coupled to the transmission and rotatively mounted about a first axis, a rear wheel suspension including a roller arm having a plurality of rollers at one end and rotatably supporting a rear wheel at the other end. An arcuate support is provided on the frame for supporting the roller arm for movement in an arcuate path whose center of curvature is coincident with the axis of the drive sprocket. A spring/damper is connected between the frame and the roller arm. A driven sprocket is mounted on the rear wheel and a drive belt or chain extends around the drive and driven sprockets.

Abstract: A motorcycle has a frame, a swing arm pivotally mounted on the frame about a pivot axis, a wheel rotatably mounted on the swing arm and an engine pivotally mounted on the frame about the pivot axis. A first elastomer engine mount couples the engine to an upper portion of the frame and a second elastomer engine mount couples a lower portion of the engine to a lower portion of the frame. The engine mounts are spaced from each other and the pivot axis.