Harley-Davidson Sportster 2012 XL 1200 loud sound when I rev?
My new Harley-Davidson Sportster 2012 XL1200 Custom makes a loud metallic plink sound after it warms up. It does not do it every time but often. I have heard it while going down the road but it happens most often at a stop when you give it a little gas. The bike has just over 1000 miles and is still under warranty. I took it in to the dealership and they did hear it and said they have not come across this before.They said maybe the fuel I was using was too low octane and suggested I use 91 non-oxygenated which I did. I have ran two full tanks of the better fuel with no change. The bike is going in for it's 1000 mile service very soon. I just want other expert advice before it goes in.