1)make motorcycle brake disc. We can help you to resolve technique problem. 2)Motorcycle Brake Disc is cost-effective Motorcycle brake disc1)Outer diameter:Φ220mm 2) Inner diameter:Φ58mm 3)Thickness:4mm 4)Distance of holes in cirum:Φ78mm 5)Dia.of hole:Φ6.5mm 6)Height:22mm 7)Brakeing effective radius:R96mm.Detailed models are as below.DIO50,C50,TAC50,DIO50,CB125T,GY6-90,JH70,SY90,WIN100,GN5,CD100, ...