No, a 54 inch mmm will not fit a 1705 Massey Ferguson. The 1705 Massey Ferguson uses a 48 inch mmm. If you have a 54 inch mmm, you would need to purchase a specially designed adapter to make it fit. It is important to ensure that you have the correct size mmm for the tractor, as using the wrong size can cause severe damage to the engine and other components.