●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.●The wheel size changes to 17 inch.Speed meter adjustment is required as a result of changing the wheel diameter.Because it is an inspection item for passing the vehicle inspection, be sure to perform.The total length and height of the motorcycle changes.The side stand must be shortened.(42310-29F10 for DR-Z400SM can be used on DR-Z400S.) For motorcycles that a spacer (or shim) is installed between the normal brake disc and rear wheel, make sure to use that spacer (or shim). However, if deformed or damaged, replace with a new one.●Genuine rear brake disc bolt is required separately.。●Because 500-sized rear wheel is only for race use or heavy custom builders, we can not accept any claims regarding its use.Also, modifying of the motorcycle body is required for installation.A 160-sized tyre touches the drive chain case, drive chain and swingarm.