A 4-stroke engine incorporating a mono-shaft multi-valve operating system, the
multi-valve operating system incorporating a first cam follower assembly that is
associated with an intake valve, a second cam follower assembly that is associated
with an exhaust valve, and a cam follower channel assembly that is integrated into
a crank web of the engine, the cam follower channel assembly including a base circle
channel, a cam channel, and a cross-over channel. The cam follower channel assembly
is configured to commonly interact with the two cam follower assemblies to operate
the intake valve at a first instance, and the exhaust valve at a second instance,
with both instances occurring while the crank web completes two rotations. When
either of the two cam follower assemblies engages with a cam channel of the cam
follower channel assembly, the cam follower channel assembly is configured to provide
a camming operation to operate the respective valve. When either of the two cam
follower engages a base circle channel of the cam follower channel assembly, the
cam follower channel assembly is configured to prevent operation of the respective valve.