The FSK 100-series is a great performance upgrade for the standard bikes front end. The kit is designed to improve the handling, cornering, and braking while giving the rider a noticeable improved feeling in all areas. The kit consists of a replacement top cap and higher performance rate springs. The replacement top cap also provides an external spring preload. It is available for small sports and street bikes such as the Yamaha R25/R3, Kawasaki Ninja 250/300R, Honda CBR 250/300R, Honda CB650F, and the Kawasaki ER6N.