●Separate sold special driven sprocket is required for installation.(Standard sprocket cannot be used.)）●Wheel replacement, including inching down, changes the steering stability and braking characteristics.Be very careful until your body becomes accustomed to the changes.●Parts may be required separately, depending on the motorcycle model.Active Digital Monitor is recommended for meter adjustment.●Order the glass coating specification by adding "Q" at the end of the part number.(Polished wheel is outside the scope of work.)●Genuine rear brake disc bolt is required separately.。●A 180-sized tyre may touch the drive chain case and drive chain.If there is touching, grind the tyre edge.Adjust or replace the drive chain, because it may touch the wheel when elongated.