Gas tank breather line

What do you do with the top line that comes off the tank. It was connected to the charcoal canister. It is apparently under pressure and is spitting out gas all over the place.

The outlet from the tank is below the top of the tank and will flow fuel if you top off your tank, especially while on the side stand. I believe there is a check valve in the hose near the cannister and/or it routes up higher than the tank on the stock bike, behind the headlight.

It sounds like you removed the cannistor and left the hose hanging lower than the top of the tank? Run the end higher than the tank and connect it to a length of hose that runs down the center downtube that went to the bottom of the cannister. You do not want fuel overflow dripping onto your hot exhaust header pipes.

On my aftermarket IMS I capped it off at the tank and hooked a hose to the gas gap.

What year/model are we talking about here?

'09 te610.

Top to a tee and into the lower. Route it down the front of the frame and zip tie it. Should be good to go. Nothing is under pressure until the tank is in the sun and expands.

Thanks. Not sure what you mean by "top to a tee" but I realized that the main problem is that the line needs to go higher than the tank before it drops down, like 99% of all other dirtbikes.

What is the lower tank line for and why does it not leak? It comes off the tank and immediately turns down and runs to the underside of the engine BUT it does not leak a drop of gas. It should leak worse than the upper hose

One is the tank vent, another is the gas cap well drain (rain/wash water, spillage).

Get yourself a "T" conector, top tube loop down to one side of tee, other side to bottom of bike, bottom breather to bottom of tee, strait out from tank. Make sence?

I'm a 510 owner so may not completely understand, but no, this does not make sense. Earlier in the thread someone stated that the lower hose is the drain for the overflow around the tank filler. The upper hose is the overflow for the tank itself. True? If so, I would think you'd want to leave the lower hose alone and route the upper hose up to a point higher than the top of the tank itself, and then to a check valve. No T fitting to tie them together. That's the only thing that makes sense to me.

True!It's just easier to route them both down.I changed my gas cap all together and it has the typical vent tube on it which works the best.Now I just plug both holes in the tank and I get more fuel in it too.

I'll post a photo. This is only for the 610, nothing smaller. The "T" would sit sideways.