Yes, the newer four strokes have crankcases that vent back into the intake, I assumed that his was the older style.

If there is a fuel line that runs from the crankcase to the intake, that is a vent line to neutralize pressure and vacuum in the crank case. If there is just a nipple on the bottom of the case, it is still a vent line. Just put a fuel line on it and run it out the bottom of the cowl.

I prefer to attach the line to the fire wall rather than let it just hang out the cowl. This way it stays where I put it. I have not secured it in the past, and then the line worked it's way into the cowl. Then you can end up with a mess inside the cowl when the excess oil drains from the vent line.