This trick looking nut comes pre-drilled so you can safety wire it on and not have to worry about it coming off or loosening up even on the roughest of rides. Without going into "Polar Moments", "Centralized Mass Coefficients", and "C of G" theories, it doesn't take a rocket scientist to figure out having great big steel nuts way up high on your motorcycle is a bad thing.
In addition to the light-weight of this trick little Yoshimura piece - it's also drilled for safety wiring. Anyone who has ever tried to drill a stock unit for wiring, can attest to how much fun that can be. Also, anyone who has ever had their front end being held on by the cables after the stock nut goes bouncing down the track, can also testify as to how much fun that experience can be.
This item fits the following applications: