The ornamental design for a cover for motorcyclefairings, as shown and described.
FIG. 1 is a right front perspective view of a motorcycle fairing cover according to the present invention;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right side view thereof, the left side view being a mirror image;
FIG. 5 is a rear view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken lines in the Figures are for the purpose of illustrating the environment of the design only, namely a portion of a fairing over which the cover is to be positioned is shown in broken lines in FIGS. 1-4 and straps for securing the cover to the fairing are shown in broken lines in FIGS. 1 and 3-6. Neither the fairing nor the straps form any part of the claimed design.