Hi everyone, I'm new here so hope this is OK.

So last weekend I was out on the trails with my 2019 CForce 400.  It was going great and then when we stopped my bike just bogged down and stalled.  Sounded like it was starved for fuel.  After waiting for about 30 minutes she fired up again.  Ran for about another 20 minutes and did the same thing.  Had to get towed out of the bush.  Took it to a buddies garage that night and it ran like a dream and I couldn't reproduce the problem.  Next day I went back out and same thing after 30 minutes but this time it wouldn't start again.  Again towed out for 2nd day in a row.

When I got home I noticed that the fuel lines were dry, not a drop when I disconnected them.  Also noticed that when I turned the key the fuel pump didn't make the priming noise that it usually does.  So I checked fuses and relays and replaced, still no change.  Checked voltage at fuel pump connection and got power, so assuming bad fuel pump.  Replaced fuel pump and still nothing.  Won't prime when turning on.

Any ideas?

Not sure if it affects the 400's, but if you look in the 800XC forum there is an issue of the "hot stall" and the fix for it.   My 800XC had the issue, but would always restart.  So I'm not sure if it would be the same thing. 

Look into deleting the evap.
Try loosening the gas cap the next time it happens.   If that helps then it is an evap issue.