The best solution for your Buell is the Ohlins Front fork. Well known from the Buell XBRR, The 43mm Ohlins adjustable front suspension with inverted forks Is the best upgrade for Track and street use. The fork was developed for the XBRR but is NOT FOR SALE anymore. The triple clamp size to fit this fork is upper clamp 50 MM and lower clamp 54 MM.
Twin Motorcycles has developd a new kit with there italian partner Style and Performance, we developed a kit for the Buell XB9 and Buell XB12 from 2003-2004 models as a direct to fit your original wheel and brake. This will be a complete kit to use your stock wheel and front brake. We will also develop this kit for different models on request.
The perfect solution for a better corner handling.