We are a manufacturer for motorcycle sprocket in Taiwan.Our front sprocket with the material of scm435. Rear sprocket with 7075-T6aluminum alloy .It is a high quality sprocket.Our sprocket used for Yamaha , KTM , Honda ,Ducati , Suzuki , Kawasaki andAprilia .We produce sprocket for street bike , dirt bike , ATV and go kart.I send our photo of 7075-T6 motorcycle rear sprocket to you to let youcheck.we have special treatment in rear sprocket , therefore it will be more hardthan original 7075-T6.If possible I hope could cooperate with you in sprocket.