Is it possible to implement Android N (Preview Version) on new Lenovo Moto G4 Plus? Is anyone tried to experiment to install Android N update in Moto G4 Plus ? or if it does installed successfully, then please guide us towards the procedures for that.
You can't install a firmware on a device that it isn't made for. This will (permanently) brick the device.

However, there is an Xposed module called Android N-ify that will make your phone look like Android N. Root access is required.