had the same problem last year on my 2k 748r.3 rockers and vertical exhaust camshaft.Spoke to DUK,guy called Andy Joynson/Johnson(Warranties dept) i think,after he sent their top tech guy to look at cam and rockers,they replaced the cam for free and went halves on the rockers,mine was not covered under warranty but had full Ducati service history(6k miles).It was in Ducati Manchester at the time.Keep pestering DUK but don't get snotty as it will get u nowhere!!ps i had 2 wait 2months for another camshaft batch to be made!and to think i px a perfectly reliable Marlboro R6 for the privilege!but it dont sound like me duke!!!
