Well, while I had the bike dismantled for maintenance and some repainting I took her out for a spin without the Moose Engine skid plate. I really didn't hear much difference in engine noises with or without the guard. There have been some posts here and there that the metal guard helped to amplify some certain noises. I only went 1/2 mile or so, but I really didn't notice much difference. Just thought I would toss this out for general consumption.