With some bikes/models having problems with water leaks (my V5 and CF150) I would suggest that owners have a look at the consistency of the coolant. My V5 had the waterpump replaced under warranty at 400Km and has been good so far. The 150 started leaking at 200km, and looking at the colour and feel of the coolant it looked very weak. Talked to the dealer about this and with his consent I drained off half of the radiator and refilled with coolant concentrate to make a thicker mix. So far there has been no more leaking and the dealer now puts more concentrate into all bikes/quads before they leave the dealership and all bikes/quads that come in for service. He has had no more customers with leaks and has been onto the importer to get the factory to change the coolant mix. I understand that using more concentrate will make little difference to the coolant effect, but the goal was to get more lubrication to the water pump ceramic seal, and it seems to be working.   
If you are looking at long term ownership I suggest you look to using a 'waterless' coolant such as the Evans waterless coolant or similar as this is also a thicker greasier coolant that will work well with pump seals.

I had a slight leak from my 800EX.  Sometimes there would be a small spot under the weep hole and I could see traces of coolant on the skid plate.  I've probably added about 8oz of water over the last few months.  Since then, I believe that leak has stopped.  I was never enough to concern me.  I did mention this to my dealer and his mechanic mentioned that there are some service bulletins regarding water pumps.  I does make sense that a more concentrated mix would stop the leak.

I actually just dropped off my 800 Ex yesterday at the dealer because mine was leaking out of the overflow hose beside the water pump. I am just over 100 miles and have filled my reservoir for the second time. The dealer stated that there is a known issue with the water pumps and that most likely there will be a recall on them. When I dropped mine off there were 2 others 800's there with the same problem. He told me that it won't leak very much while motor is running , most will leak after motor is turned off. I started mine up and it dripped about 15 drips in just a minute that the motor was running. He looked at me and said " guess I was wrong"!

Who is your dealer? Karns or Buttorff?

Karns

Speaking with my local dealer today about the waterpump issues, since he has been putting more concentrate in the water he has not had one comeback on any machine sold or serviced by him. Be worth trying if your machine has a dribble.

My Z8 leaks a lot!  I have refilled the coolant twice and put a new hose on that goes up to my snorkels. The hose will be full after some riding or sitting around. Spoke with my dealer who said that the ceramic gasket takes time to seal. Well, I'm at 400 miles and it still does it. I'm going on a 10 day trip to MI and Canada to go ride. If it hasn't stopped my the time I get back, the dealer said he'll admit it's not right and isn't going to bed in. Haha. I seem to be the only one of his customers that actually puts any miles on or has done any mods, so we get along pretty well. Just wish he wasn't a 4 hour drive away.   I'll let you know how it goes after my trip

[2015 Z Force 800 53/Trail EPS]

Mine was leaking from what I thought was the water pump housing gasket cause it was wet along that edge. I tightened it up a little and talked to my dealer who like you told me it was the mechanical seal and it was coming from the weep hole on bottom. I found it on the side but he said it would quit when the ceramic brakes in. Well, it must have because it did quit but.. oddly after I tightened up the cover bolts.

Mine was leaking from what I thought was the water pump housing gasket cause it was wet along that edge. I tightened it up a little and talked to my dealer who like you told me it was the mechanical seal and it was coming from the weep hole on bottom. I found it on the side but he said it would quit when the ceramic brakes in. Well, it must have because it did quit but.. oddly after I tightened up the cover bolts.

This is correct. It is normal for them to leak a little coolant when new out of the weep hole tube. If it continues after a few rides then your ceramic seal has failed and needs to be replaced.

You'll need part 0010-081000 (Seal Kit) & 0800-080004 (PUMP COVER SEAL)

Just had to fill my reservoir today. It was all but empty! You know all this BS about the seal leaks before it becomes secure and doesn't puke out coolant any more sounds a bit fishy to me. On either of my Can Am's I never, not once, had to put a drop of coolant in them. That's with probably 8000 miles on them. Now here it is, 400 miles and already one complete reservoir refill?
I don't see it leaking out anywhere as drops, but there is a damp look around the water pump area. Checked the bolts all seemed ok?

Under warranty than bring it back. At least the pump is easier to swap out. Make them replace it.

[2015 Z Force 800 53/Trail EPS]

Mine did quit at about 250 miles and went through almost one reservoir. And it was right there at the pump too. If yours hasn't stopped in 400 miles, it isn't going to IMO. Take it in.

Thanks guys  for your opinions. ...I do beleive as soon as I  get back from hunting next week I will definitely be bringing it back to the dealer.

We were told the ceramic seals can take time to break in but I agree at 400 miles it seems that seal is not going to.

One thing I will heavily recommend you do is get rid of that crap coolant they put in them. After seeming the inside of 4 of these engines (I've posted pictures of a gel in the water jackets) I completely flushed out the coolant systems of our personal ones and added a good quality coolant. We use Maxima Coolanol. It has honestly kept the unit cooler and I've especially noticed this at idle where it consistently runs at 2 bars instead of 3 with the fan turning in and off like it did with the stock crap.

[2015 Z Force 800 53/Trail EPS]

We were told the ceramic seals can take time to break in but I agree at 400 miles it seems that seal is not going to.

One thing I will heavily recommend you do is get rid of that crap coolant they put in them. After seeming the inside of 4 of these engines (I've posted pictures of a gel in the water jackets) I completely flushed out the coolant systems of our personal ones and added a good quality coolant. We use Maxima Coolanol. It has honestly kept the unit cooler and I've especially noticed this at idle where it consistently runs at 2 bars instead of 3 with the fan turning in and off like it did with the stock crap.

I think I am going to do this to mine too. I've see the gel-pics and don't need that issue.