Where shall we start......... Blocked injectors, unresolved electrical problems and most of all rockers that shat themselves and totalled your engine.
These are all things that I've come across from mates who own them. They're a real 'friday afternoon' bike, I have two mates who have put 20,000 miles on theirs with no real problems and I have other mates who have spent £2000 on an engine rebuild after the bike had done less than 9,000 miles.