RK Vortex Gld O-Ring Stl QA Chain and Sprocket Kit SV650 99-08/S 99-07/SF 08-09 RK Chain Model: GB520XSO-110 RK Chain Type: Gold O-Ring Vortex Front Sprocket: Steel 14 Tooth Vortex Rear Sprocket: Steel 45 Tooth Bike's Stock Gearing: 15-45 / 44