Fixes the sluggish clutching issues. Unmatched acceleration and track speed gains. Lightning-quick back-shift (down shift). Holds RPM much better than factory. Secondary smooth shift washers included for buttery smooth secondary shifts. Much smoother and better working reverse. Easily adjustable for fine tuning. Includes setup guidelines for specific models and different modifications options. Includes Goldstar magnetic adjustable clutch weights, Bikeman Performance primary spring (some may come with two primary springs for different years and/or engagement RPM), Bikeman Performance secondary spring, two smooth-shift secondary washers and a custom cut helix.