01-06 HARLEY FXSTDI More of a rounded shape compared to the Bare Bones, the Silhouette Solo creates a stylized line from tank to fender. This seat looks great with stitch graphics. Low, sleek style. The Silhouette Solo's stylized flow connects the tank and fender. The front of the seat is made to flow into the gas tank area of the bike for a new, improved look from gas tank to rear fender.