JT steel front sprockets are manufactured using Japanese SCM420 Chromoly or C49 high carbon steel. Accurately machined with the tightest of tolerances to guarantee a perfect fit and chain alignment. Fully heat treated / Fitment: Ducati: 95-98 600 Monster ; 95-03 748 BiPosto, 748, 748S; 00-02 748 R ; all 748 Sport Production