We revisit the photometric variability of stars in the M 67 field using Kepler/K2-Campaign-5 light curves . In our previous work , we limited the search area around M 67 to that of a recent ground-based study . In the present work , we expand the search area and apply a more rigorous period-finding algorithm to determine the rotation periods of 98 main sequence cluster members from the same data . In addition , we derive periods of 40 stars from the K2SC detrended light curves . We determine the mean period of single sun-like main sequence cluster members to be 29.6 \pm 0.6 d. Assuming the periods correspond to stellar rotation , the corresponding mean gyro-age is 5.4 \pm 0.2 Gyr .