YoYo is a floating bug in which the legs do all the talking.
Hook: Mustad 9671 (2XL) 2-6
Legs: Chamois spirals
Body: Closed cell foam rubber
Thread: Tan Kevlar
This bug is pretty easy to tie, cutting being the most critical steps. The first step is to cut circles out of a sheet of chamois, making them slightly larger than a quarter for a size 2 hook. Cut a spiral cut, making at least two revolutions to the spiral. Cut as many as needed for the tying session before the tying begins. Also precut the ovoid foam, slicing lengthwise to the center axis.
Lay in a solid foundation and cement, then tie in a pair of legs at the tail. The spiral should have the outside point facing toward the eye so that the circle lays horizontal to the side (when supported). The leg on the opposite side should be a mirror of the first. This allows the chamois to coil and uncoil naturally with the motion of the retrieve. Tie off at the tail position with a wrap knot and cement. Start on the next bug.
When the cement is thoroughly dry, apply 5 minute epoxy (mix small amounts several times, rather than try and race the clock with a large batch) to the foundation and apply the foam body. Allow the epoxy to set, then draw in eyes with a marker. Other markings may also adorn the top, but leave the bottom side of the body blank for the most natural appearance.
This is a slowly fished bug. In some situations, it can be fished quickly in a realistic swim. But it best served in twitches to allow the legs to extend and then contract. The more the legs yo-yo, the more attractive it is to fish. The longer it stays in a zone, the more likely it will trigger a surface strike. If the water is rippled from the wind, an even slower approach is possible, letting the wind action may the bug active. Be ready at all times for vicious surface strikes, as this bug really stirs up some fish dander in a hurry.