Vapor lock

[agfish18]

Have any of you experienced this on your 1125R?

I filled my tank yesterday, then drove about 8-10 miles on the freeway in 90+ degree weather to class... When I parked I noticed that my Fuel overflow tube was dripping more than usual (and no I did not fill the tank completely full, just to the first metal ring in the tank.)

Anyway, I wanted to see if the fuel had expanded enough to really go over the lip that much. Well I opened the tank and gas erupted from it like a volcano (roughly 2 gallons worth and went about 2-3 feet in the air from the opening.) Gas got all over me, my bike, and the ground.

I took the bike home to wash the fuel off, and check for any other issues that would cause it. I dont know if that is to be expected when the bike is hot and it has a fresh tank of gas?? kinda odd... The bike runs fine and is still staying at normal temps. any help appreciated.

 

[poppinsexz]

Sounds like your fuel tank vent might be holding to much pressure in the tank.

You might check the line for kinks/pinch points.

 

[sk8ace]

Wow! that could have been a horrible situation if that gas ignited... scary stuff! Hope you get it figured out!

 

[agfish18]

no kidding.... I was at school, so I went to the book store to buy a new shirt as I reeked of gas... I waited about an hour to start it even after I doused the bike with a couple bottles of water.

 

[Red93stang]

It happens to all 1125's thats one of the problems they have been having. I had to install the Cali Can because I park mine inside the basement.

 

[GMan1125R]

Wiat til you hear the gas boiling in the tank. That scared the crap out of me the first time.

 

[Mike Van V]

Red93 -

Never happend to my 1125...!
Not once...

Mike

 

[agfish18]

Thanks to all that replied. I took the bike home, and inspected the overflow hose. Couldnt find anything wrong... Checked the fuel vent... couldnt find anything wrong.

Ended up cleaning K&N filter to help with airflow, draining then re-filling coolant container (never hurts, and removed inner airbox cover as it is less restrictive to the hose. I havent had any problems since.

My thought is that it was bad gasoline and a hot day. I used 91 octane, but at a gas station I had never used before. I added a bit of an octane booster to the rest of the tank, and the problem seemed to work itself out. I havent even heard the slightest pressure release when opening my fuel cap now.