Where is it binding?
If it is track binding on the frame, you need wheel spacers or wider spacers.
Track is getting bound/kinked between the sections, then most likely you need all new pivot bolts and/or bushings. Some tracks use bolts with bushings others use a softer shoulder bolt without a bushing so the bolts wear faster than the track link.
Track tension is important too. Over the tires steel stracks should between 3/4" - 1 1/2" slack (natural sag) when laying a straight edge across top of the front to rear tire. Too tight can casue the tire to blow off the bead if a rock or hard dirt clump gets between tire and track. Too loose and track can flop coming around the tire and catch on the frame, then cuase it to push a tire off the bead. Too loose can also allow it to detrack.