I have my letter from KTM extending my warranty for a year and I have to have my side stand replaced along with the
oil filler pipe. No mention of the filter, so guessing that rumour isn't quite right. I have taken a look at my oil filler pipe and it is dozed/cracked, so does need replaced. If those are the problems that have given me an extension to a three year warranty, happy days.
Maybe Engineers horse needs shooting or ears de-waxing.......