Kuryakyn 9226 Mastertune Dual Bike Kit The most powerful tuning tool available for your motorcycles ECM , bar none! This one tool contains three powerful programs including Mastertune tuning software, Data Master data acquisition & VTune, a self tuning software solution. Mastertune has over 20 tables and parameters to optimize your ECM including air-fuel mixture & timing. (Some early year bikes may have fewer tables). Not compatible with Apple/Mac.