air trapped in tank ?

I just got home from work and drove my bike into my garage. I remembered last time I had filled it up I thought I heard air rushing out or into my tank when I opened the fuel cap. I am down to 1/2 a tank and decided I should open it again and check it.
I opened the fuel cap on the tank and the air had to equalize. there was quit a sound.
I am guessing there is an air vent somewhere with a pinched hose or its blocked.
What are your thoughts before I tilt that tank and take a look.
Thanks in advance
Dan

 

Your thinking appears to be on the money. Check the hose routing by lifting the tank and go from there...certainly shouldn't be any hissing etc

 

thanks after I eat supper going to head out and take a look at it

 

If I recall correctly there was a vent hose on the tank that runs down the right side of the frame near the exhaust. My 2000 VFR had the same issue after I first purchased it and I discovered that the rubber vent hose was too. Close to the exhaust and had melted itself shut. It also melted the fuel overflow hose to the point it had a large hole in it. I replaced both hoses and everything was fine. Not sure if both hoses are supposed to run down that side but that is where they were when I bought the bike.

 

thanks guys, I just went out and as soon as I started to loosen the bolts to tilt the tank back I heard pressure coming out. I Guess the air vent hose was not properly routed and was getting pinched between the tank and the top of the air box. I rerouted it and will give it try tomorrow. I am pretty sure I got it though.
You were right zoom-zoom they do run down the right side..
I love this site............... everyone here so awesome !!!!!
Thanks again I appreciate the input