Ok, so I was driving along (recently filled up) and made a stop about 5 miles down the road. When I returned to my bike there was a little puddle of gas under my bike  I looked under and saw a couple of hoses just hanging right by my exhaust pipe and center stand.

Look at picture attached.

Should I be worried? after taking a closer look there are three hoses: 2 of them just end (looks intentionally), not ripped or anything. The third has a stopper on it (little bubble that you can feel fluid in).

To be safe I am not riding the bike until I can figure out what it is (usually ride 5+ times a week).

Would there really be gas air lines right by the exhaust?

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Im positive that the capped off line comes from your airfilter. Its a drain for when gasoline gets pushed back into your filter, or for when water enters your airfilter somehow.

Then there should be a drain from your gascap. When you overfill, and spill a bit, this is will be spit out there aswell. (not capped off) the last one im not sure about though. battery drain hose maybe? I think this review talks a bit about those hoses.
I havent had enough coffee jet to find the 10 second he says something about those hoses, so you'll have to see for yourself.
(watch at own risk, im not very sure hell give you the info you need.)
https://www.youtube.com/watch?v=AzTpSMWFhbY

My guess:

option 1: You've recently filled up, and fuel has made its way trough the overflow line to under your bike.

option 2: Sometimes your carb throws out gasoline (especially when valves need replacing i think) trough your airfilter. this fuel will be drained by your airfilter drain plug line.

What Krav said...plus a bit more FYI...

Gasoline expands significantly with increase of temperature.   The gas, at the filling station,  comes out of an underground tank, nice and cool, when you fill up.  The heat of the day, plus considerable heat from the engine soon heats up the gas in the tank and it expands, possibly overflowing, especially if you overfilled in the first place.  Overflow gas comes out from one of those tubes on the lower right side of the bike.

When you fill up, keep bike on side stand, not center stand.  Only fill until the gas level reaches the very bottom of the filler neck.  You'll have to look into the neck wile filling to see this. Do not overfill!

Cookie

Quote from: Harrisonda09 on September 17, 2014, 10:42:38 PM
Ok, so I was driving along (recently filled up) and made a stop about 5 miles down the road. When I returned to my bike there was a little puddle of gas under my bike  I looked under and saw a couple of hoses just hanging right by my exhaust pipe and center stand.

Look at picture attached.

Should I be worried? after taking a closer look there are three hoses: 2 of them just end (looks intentionally), not ripped or anything. The third has a stopper on it (little bubble that you can feel fluid in).

To be safe I am not riding the bike until I can figure out what it is (usually ride 5+ times a week).

Would there really be gas air lines right by the exhaust?

Yepp, what they all have said..

Though on mine I think those hoses are routed to the right side of the bike. They come out kind of where your heel sits. Away from the exhaust.

On a funny note. I was riding my friends Buell 1125R. I filled it up with gas, and unknowingly overfilled it a little. Hung my helmet on the passenger foot peg and went into pay for gas. Turns out the fuel drain hose comes out of the passenger foot peg.. dumped a big of gas inside my helmet!! I was close to home so I went and swapped helmets!

Yes right side.

BTW...riding 5 miles and then stopping is the perfect scenario for overflowing....you didn't have time to burn off much gas while moving, and keeping engine and tank cool....

Then you stopped with almost full tank, and allowed hot engine to heat up tank without cooling air flow.......gasoline expanded and overflowed..

Most of us ride quite a bit before stopping, so the tank is already well below full...

This is an argument to fill tank at beginning of a ride, rather than at the end...




Cookie

Quote from: The_Paragon on September 18, 2014, 05:45:17 AM
Yepp, what they all have said..

Though on mine I think those hoses are routed to the right side of the bike. They come out kind of where your heel sits. Away from the exhaust.

On a funny note. I was riding my friends Buell 1125R. I filled it up with gas, and unknowingly overfilled it a little. Hung my helmet on the passenger foot peg and went into pay for gas. Turns out the fuel drain hose comes out of the passenger foot peg.. dumped a big of gas inside my helmet!! I was close to home so I went and swapped helmets!

Thanks guys,

I rode 30+ miles and no issues so this definitely was the case.  Thanks for the speedy responses.

-Cheers

You should reroute the hoses to the correct place to avoid fuel over swing axel or exhaust, my battery overflow hose ran to the same point - before removing it when I changed to sealed gel type battery.


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I agree. I moved them to the side (zip ties are amazing). Thanks again everyone.

Wanted to revisit this post for a sec... The tube with the nipple cap deal on it. That is the air box drain hose. Cap with the slit is on there so that liquid can drain but nothing can get sucked in, because that would bypass the air filter. If the gas came from that hose, your issue may be a little more than you initially thought. By your pics and your description, it seems gas came from the airbox drain hose.

There is only one way for gas to get into the airbox, and that is by fuel overflow in the carbs. Fuel can overflow when parked if the petcock is set to prime and your carb needles aren't seating properly, or if your carb floats are too high. This can also happen when the bike is on and petcock set to any position, and that would typically mean it's a carb float height issue.

If this overflow occurs, you need to check your oil. If it smells like gas, and/or is now overfilled, you need to change your oil in addition to finding out why the carbs overflowed and fixing that. Gas reduces lubrication, needless to say, which is not good for your engine.

Note that if your drain hose kept up with the overflow, gas would not make it into the engine... But it doesn't always happen that way - so you do need to check the oil for this.

- Bboy