Skid Plate Noise !
I noticed a large increase in engine noise when I installed the HT aluminum skid plate, and I mean noises were resonating up to me on driving around town that I kept wondering "what the heck?" Sounded like the thing was ready to toss a rod, throw a chain, just hard to listen to. But being new and knowing the only thing I did was add the plate I decided to take it off and test ride. Back to quiet thumper. I then wrapped all the contact points of the frame (where it clamps) and the U-bolt and spacer block with electrical tape and re-install. Knocked the resonation I was hearing way down, guess about 90% gone. Made a huge difference.
Anyone else tried this or have an even better solution? The only thing I think might be better is I have some clear adhesive insulating plastic sheating that maybe I could make two nice wraps, but it's a lot harder than simply wrapping good quality (3M) electrical tape about four wraps. It sure did deaden the sound.
The only issue I have with the electrical tape is longevity. It will undoubtedly get gummy with chain lube, heat etc...