[Wrodriguez3]

Just got my 1st-beatiful- 05 k1200 LT with 9600mil. After taking her home I noticed that the previous owner had fill the tank to the top, so kind of him. After riding for some time, I opened the gas cap and air was coming out –built-up-, I thought nothing of it, after some more riding the same happened. I know something is not right. Any advice?

 

[sheldan2]

Look up canisterectomy..

 

[jzeiler]

In the mean time drive with your cap slightly loose to let the tank vent. Your charcoal cannister is clogged preventing the tank from venting. many have removed the cannister just to keep this from happening as a colapsed tank can (and will) dent the fuel sending tube and mess with your gas gage. All is an easy fix. Like Sheldon said search on cannisterectomy.

 

[CharlieVT]

Just got my 1st-beatiful- 05 k1200 LT with 9600mil. After taking her home I noticed that the previous owner had fill the tank to the top, so kind of him. After riding for some time, I opened the gas cap and air was coming out –built-up-, I thought nothing of it, after some more riding the same happened. I know something is not right. Any advice?

What John said,
However, are you sure it is pressure and not vacum?
It is more likely that the hiss you hear on loosening the gas cap is vacum not pressure.

 

[DanDiver]

It's easy to check and see if the canister has been removed. If it is still there, it is possible that the hoses were clamped or disconnected.

If it is there and in use, remove it... Follow the easily found instructions with a search.

 

[JPSpen]

Two hoses from the charcoal canister. One on each side under the seat...The coupler is more towards the front on the left side.. Unplug the coupler and plug the side towards the engine...
Right side coupler is more towards the rear.. Unplug and route the longer length of hose down to vent the tank to the ground...

Easy Peasy..

John

 

[pauleknight]

for my .02 cents, I had air "sucking" in at the gas pump when I opened the gas cap.

I had the bike at the Atlanta BMW for an on the road set of tires and mentioned it to them and the pointed out that the drain hose at the back of the bike had positioned itself against the right rear saddle bag and was not allowing air to come in.

I was suspect at that the time since this did not seem reasonable.

Since they "moved" the hose the problem did go away...

So I recommend checking the hose under the right rear saddle bag to make sure it is positioned correctly..