coolant blowing out of the overflow under hard acceleration

That's usually about as smoking a gun as you can get, for a failed HG, especially on a forced induction application, but I'm as skeptical as you that that's the issue......

Easiest way to confirm is grab one of those "coolant sniffer" kits with the blue juice in it, and see if you can get it to turn yellow.

 

Im going to pick one of those up today. Also just did an oil change and sent a sample for analysis.
I really don't want to pull the motor at 50hrs so I'm replacing all the cheap and easy stuff first, hopefully I get lucky.

 

It's on stock boost/stock tune? I just can't see that motor failing in that manner at that low a usage

 

All stock, it’s fast enough how it is haha
I can’t see how it would fail this early unless the manufacturer screwed something up during assembly.
Would there not be other issues like coolant in the oil or smoke coming out the exhaust?

 

That might be the first HG issue I can recall hearing of, out of these bikes/product line, wow. Sucks to hear that.... did you check the deck and head for true? Before reassembling? There's just got to be an underlying cause for the failure, I can't help but think

 

Is there visual evidence of a leak on the old head gasket? Did you do a leakdown test before disassembly? As BombardierBomb mentioned, you should check the head and block deck surfaces for trueness. Have the offending part surface ground before assembly.

 

Here is what I found! The head gasket was blown on the center cylinder, and was leaking not only into the coolant but into the other two cylinders as well. You can see the difference between the old and new gasket in the pictures. I checked the head and deck, it is true and undamaged luckily. I think the stock stretch bolts were allowing the head to lift under boost somehow.. The new ARP studs look and feel much more robust than the OEM bolts. Worth the $500 for sure, especially if I never have to do this again. Long story short, its all fixed and running better than ever after a weekend of work and a couple cases of beer. I would say the hardest part of the whole project was getting all the plastics off to actually get to the motor. I had it out last weekend for the first real trail ride and it performed flawlessly, no more coolant mess, no more strange noises, and as a bonus, I can actually hear the turbo spool now. I went easy on it for the first couple hours and then let it loose the rest of the day and night.
I appreciate your help and ideas, hopefully I will be the only one to experience this issue!