With sleeved lines, untie the loops and slide the sleeving to the same location on both lines. Fold both lines at the center of the sleeving and retie identical loops. Lines can stretch with use. Check for equal lengths again after a few flights. If your stunt kite has snaps on the bridle lines, just attach them to the loops at the ends of your lines.
Many kites terminate the bridles with knotted loops of line instead of swivels.
First take the loop at the end of your flying line and form a loose lark's head knot. Then put the bridle loop through this lark's head. Finally, tighten the lark's head up against the knot on the end of the bridle loop. Go back to your handles and untwist the lines to be sure that you have the right flying line in your right hand. While you hold the handles with the lines taut, have your helper stand downwind from you, behind the kite, holding it with the nose up.