This was talked about on another thread for the 900 and I thought we could nail down where the lines terminate on the XP 4 1000. I have the Service Manual for the 2014 RZR XP 1000 and it does not show the fuel line vent termination.

This photo shows the Engine Crankcase Breather Hose hooking up to the bottom of the Intake Airbox Hose:

I am not sure what this vent hose is from? It terminates over the fuel line hose just under the rear cargo area on the drivers side:

This clear hose mounted high and behind the Air Box Filter Assembly is the fuel vent line. I was not able to find the termination point of this line. It runs horizontal behind the Air Box Filter Assembly and at the moment I am not taking my cargo box out. This photo was looking over the drivers rear tire at the Air Filter Box Assembly: