Hey! I've just dropped of my 790 to my local KTM dealer because of a very loud engine ticking sound. Found out a couple of hours later that cylinder 2 has dropped a valve and cylinder 1 has some extreme valve wear. Bike has 14000kms on the clock. Anyone with a 790 duke that has had valve failures? Just waiting to see if KTM will cover under warranty as the bike is 8months old (bought new from dealer at a great price).