Rocker arm mechanism under non - symmetrical arrangement of motorcycle engine

The utility model discloses a rocker arm mechanism under non - symmetrical arrangement of motorcycle engine, admit air down rocking arm and exhaust down the rocking arm is common and rotate that to install under the rocking arm epaxial, admit air down rocking arm and exhaust down the rocking arm lower extreme respectively through the circular arc surface or install under admitting air rocking arm and exhaust down the roller of rocking arm lower extreme contact with the cam rotation, admitting air down, the rocking arm comprises master arm and slave arm respectively the rocking arm with exhausting down, admitting air down, down the structure of rocking arm is inequality so that by rocking arm separately -driven's under admit air down rocking arm and the exhaust (air) intake valve for rocking arm and exhaust, the valve lift of exhaust valve, the phase place with open constantly not related each other. This structure can reduce emission, the last effect of hoisting power by furthest performance valve timing mech