The invention provides a motorcycle having a frame, an engine coupled to
the frame, and a crankshaft assembly. The crankshaft assembly includes a
first flywheel half having an aperture, a crank pin including a first end
portion, a second end portion opposite the first end portion, and a
bearing surface between the first and second end portions. The first end
portion is press-fit into the aperture of the first flywheel half. The
first end portion, the second end portion, and the bearing surface are
coated with a friction enhancer. A bearing is positioned at least
partially onto the bearing surface, and a connecting rod has an aperture
that at least partially receives the bearing.