Motorcycle Pinion Gear Streetfighter 959 998 1199S Fit For 899 955 Panigale V2 Streetfighter 959 998 Panigale V4R 1199 1199R 1199S 520 15T motorcycle front sprocket direct shaft installation , fits output splines , no or extra adapters needed stable torque delivery , reduces chain skip , delivers linear acceleration at engine RPM solid blank structure , tooth machining , smooth tooth surface to lower chain abrasion OEM matched spline count outer dimension , uniform tooth thickness for long term chain matching