Hi!
It's come back to me! For our bike it's a recall which Kawasaki re-badge as something like an "authorised dealer repair". About 3 years ago mine started leaking. I called the local Kawasaki dealer dealer and confidently told them it was a known issue and it was a Kawasaki warranty/authorised repair. They took Vin and called back it was approved by K.A. (If one dealer denies your request try another, you never know. It's a pain in the ass for a busy dealership mechanic because K.A. don't pay well, but work is work if they're quiet

). While I was having the work done I also had the valve clearances adjusted and asked them to have a gander at valves etc because of some talk on the net of 07 engines lunching themselves, cost me an extra $100 labour plus a couple of shims or whatever, that's why I asked how many k's your bike had.
From memory it's a gasket kit with 2-3 parts which they change out.
HTH
Tim.