Not sure where the Ninja 650 is being assembled but the Versys is being assembled in Thailand. On my '11 Versys I smell a little coolant smell after a ride but the level has not dropped at all in 16500 miles. No issues so far except blowing out all the O rings during my big ride this past summer. If this X ring chain only lasts 15,000 miles it will be time for a driveshaft on the next adventure style bike.If you are leaking oil, you need 92049 and 92055B. If you are leaking coolant, you need 49063 and 92055. However, since you are already inside the water pump, you might consider replacing all those parts. The mechanical seal is the most expensive, but still only $13 or so. There is also another o-ring that is not shown in the above diagram. It goes around the entire edge of the water pump cover. Chances are the original one is still good.
You will need to drain the coolant, but you don't have to lose it if you save it to a clean container. if you put the bike on the sidestand, you will not lose any oil.
Interesing note: in the Versys forum they seem to be having a lot of problems with the mechanical seal. There are even reports of them leaking on the showroom floor. However, it's the same engine, so go figure.
My first repair started leaking right away also. Then I did what I described five posts above and it stopped. That small hole must be clear.On my '11 ninja, with a mere 4,700 miles, it has been in the shop five times for coolant/oil leaks in this same area. It's now going in for the sixth time. Many a seals have been replaced. It was happenng before the warranty expired, so the shop keeps working it. And I'm going to keep taking it to them until they get it right. Wankers. I relish seeing them cringe when I walk through the door. I only hope it drives them to fix it properly this time. Always the optimist...