I assume we are thinking about front fender----all my 11 maxi scooters have needed front mud flap----they are getting harder to find/buy---My XTown 300i has one I took off my SilverWing 600, bolted on and it works fine....no crap/mud/dirt on lower front of scooter.....they probably should be standard in all markets. Mine does not appear to block engine cooling-----think 80-100 years ago front mud flap was standard on many bikes, as well as long fenders....guess many people, designers included do not ride in the rain/bad weather these days.