Power unit for bicycle

FIG. 1 is a rear right perspective view of a power unit for bicycle showing my new design;

FIG. 2 is a front right perspective view thereof;

FIG. 3 is a front left perspective view thereof;

FIG. 4 is a rear left perspective view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a right side elevational view thereof; and,

FIG. 10 is a left side elevational view thereof.

The portions of the power unit shown in broken lines are for illustrative purpose only and form no part of the claimed design.