 The Super X also marked the return of leading-link forks on Excelsior motorcycles, which had earlier switched to trailing-link forks similar to those used by Indian but with coil springs instead of Indian's quarter-elliptic leaf springs.The Super X had originally been envisioned as a competitor to the Indian Scout which was, at the time, powered by a thirty-seven cubic inch V-twin engine.Indian's initial response to the Super X came in 1927, when they enlarged the Scout engine to forty-five cubic inches.