A cam plane is defined perpendicular to the longitudinal axis and disposed between the open ends of {HEAD ~ the cylinders} and a second end of {TAIL ~ the engine housing} 
A cam plane is defined perpendicular to the longitudinal axis and disposed between the open ends of { HEAD ~ the cylinders } and a second end of { TAIL ~ the engine housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL