When the rear lever handle is rotated in {HEAD ~ the downward position}, {TAIL ~ the rotational moment} is translated through the lever pivot rod causing the upward pivot action of the lever cam end  
When the rear lever handle is rotated in { HEAD ~ the downward position } , { TAIL ~ the rotational moment } is translated through the lever pivot rod causing the upward pivot action of the lever cam end
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH