Originally Posted by YOGOI
If you run the single vent off the "T", DOWN or under the bike it can create a syphin effect and on real hot days you'll have gas pour'n out that vent line (I have seen this happen).
I've never had a problem. I think the syphon happens when gas gets trapped in a dip - when it starts to flow out of that dip a suction is created. I've never had an issue and have ridden on 90+ degree days on trails with the fan running non-stop.
I think mine works because the gas never get's trapped along the run of the line.
I'm gonna try your method but I had some problems when I tried this.