There was one guy from turkey who posted to the forums about having his top end let go and valves shoot all over the place.
I also saw a youtube video of a guy who either smashed his oil filter off or didn't tighten it enough and it vibrated off.
'gokhanbolut' from Turkey and 'bornrider' in Alabama had their valves collide with pistons and released from their keepers when accidently over-revving engine.
The guy in Slovakia who had a connecting rod punch through his Versys' crankcase at about 7000 rpm under moderate acceleration, had his engine rebuilt on warranty. He was at 12300 Kms (7640 miles). YouTube video showed the connecting rod poking out of crankcase in front, and trail of oil on the road. Video has been removed:
"I bought it in March 2007... The break in i did exactly what manual said. I dont remember it exactly, but after 600 km i could do 6000 rpm. I do step by step all the things what was written in manual. Next engine i will try dynamic break in (MotoMan). I changed oil after 1000 km, as manual said. Then 6000, and then 11200 (oil, brake fluid, sparks). I use 95 Natural (95 RON/91 USA pump octane), too. It was maintained as my only child... I was told that probably the piston was broken."
"They repaired it well with about 70 new parts. Yes, the piston rod was broken. They said that it was defect of material. They apologize. The approach of Kawasaki dealer was excellent."
c881 of the UK Versys forum was at 67200 kms (41731 miles) in January of this year... A 'Kawette' french forum member was at over 80000 Kms (49709 miles) in November 2008 with his well maintained and un-abused ER-6f when he sold it and got a new 2009. His engine took 1/4 liter of Castrol synthetic "Power1 Racing" 10W50 between his 60000 and 72000 kms oil changes. No oil accumulation in pickup hose at base of airbox by the crankcase vent. No coolant loss, no leaks or any problems whatsoever.