AFAM uses the best alloy steel available to produce their front sprockets. Minimum tolerances combined with the race-proven AFAM tooth profile guarantee the quality you demand for your high performance bike. / Fitment: Yamaha: 96-98 SZR 660; 87-95 XT 600; 90-03 XT 600 E; 87-89, 90-95 XT 600 Z Tenere; 90-95, 96-00 XTZ 660 Tenere