fuel problem

[Rickstir51]

I'm currently on a road trip from New Mexico to wahoo NE. and when I last stopped for gas I noticed a plate sized circle of fluid on the ground jusy below the raditor at first I thought oh no a radiator leak but after looking closer found out it was fuel couldn't find any leaks so I continued on to my final stop after I arrived and said hello to family I went to move the bike to a better location and there was the plate sized circle of fuel. This morning took off the lower fairing and found that fuel had come out of both hoses by the air filters. is this something I should be concerned about or do I have a major problem. I want to get this taken care of before I head back next week.

[Kregerdoodle]

Was your tank full both times it happened?? Some times if your tank is full and its hot outside the fuel will expand and exit through those vent tubes..

[Monty]

Especially if you have drilled holes in the filler neck, to get more fuel in.

[V7Goose]

Ordinarily, you will never get a heat-expansion leak from those two front vent hoses. Those are the carb overflow hoses, and the only time you would see liquid from them would be from a stuck float or damaged and leaking float needles. Your bike is way too new to have worn float needles, and it is VERY unlikely you would have stuck floats on multiple carbs at the same time.

 

So that doesn't leave many options. I suppose it is possible that the floats in your bike are set WAY WAY too high (as opposed to the normal factory way too high), and you are getting some heat expansion that way, but still seems unlikely that it could ever be enough to cause a puddle under the front of the bike. But it is not uncommon for these bikes to have a bit of gas smell about them after they are parked in the garage, and I find that after I have properly set the float levels, that problems goes away, so I guess that supports your problem being just floats that are too high.

 

If your tank is too full, the heat expansion there will cause the fuel to drain from the vent hose near the tip of the side stand, not anywhere near the front of the bike. You might pull that plastic cover around the key on the top of the tank just to make sure that th e vent hose is actually connected to the tank.

 

Bottom line is that the front vent hoses are the carb overflow vents, so unless there is actually gas running out of them with the key on (the fuel pump will keep pushing it out if the float needles are not properly closing), there is nothing to really worry about until you get the floats properly set. Just make sure you don't let anyone smoke around your bike!

Goose

 

Oh, BTW - the factory sets up those vent hoses to cross over, so if you do find gas running out of one hose, it is coming from a carb on the OTHER side unless someone has already changed the hoses like I do.

[BoomerCPO]

I have experienced that here in the hotlands of Loozeeanner when I fill the tank completely right up to the gas cap rim.....and I no longer do that cuz it spooked me too when it happened!

 

Boomer.....who sez get yerself some pygmies and make em pack extra gas for you....otherwise they will play poker and fight in yer saddlebags.

 

Edited: I'd go with the Goose on this one.....lucky for me this has only happened 2x's and never again so far!

[Rickstir51]

ok pulled the tank and traced the vent hoses the one on the left [has the most fuel coming out of it] goes to the right bank of carbs. The hose on the right [ has very little fuel coming out] goes to the left bank of carbs took the covers off both sides the left has a lot of fuel residue and the right has very little fuel residue. the hoses are connected to a tube that connects the two carbs together on each side.

[Rickstir51]

ok put everything back together turned the key to the on position fuel pump clicks for a few seconds then stops. left the key on for about 15 minutes on fuel out the hoses then started the bike and in just a few seconds fuel starts dripping out of the left hose. turned the bike off and left the key in the on position dripping stopped after a short time. waited for ten minutes and started the bike again after a few seconds fuel started dripping out the left hose again.

[V7Goose]

That tells me that your floats are probably way too high. I'm guessing that just the vibration of running along with the natural flow of gas into the engine is allowing the bowls to overfill before the floats can shut off the needle. Pulling the carbs is a real big job while out of town, so I'd just ride it like that until you get home and then pull the carbs. Yamaha should fix that under warranty without an issue, but I doubt I would trust many shops to do the job correctly.

Goose

[Rickstir51]

That tells me that your floats are probably way too high. I'm guessing that just the vibration of running along with the natural flow of gas into the engine is allowing the bowls to overfill before the floats can shut off the needle. Pulling the carbs is a real big job while out of town, so I'd just ride it like that until you get home and then pull the carbs. Yamaha should fix that under warranty without an issue, but I doubt I would trust many shops to do the job correctly.

Goose

 

 

that's the conclusion I came up with. called the local stealer and he told me that it is not cover under warranty the it is considered general maintenance and want to charge me 400+ to fix it.

[RandyR]

that's the conclusion I came up with. called the local stealer and he told me that it is not cover under warranty the it is considered general maintenance and want to charge me 400+ to fix it.

 

Call Yamaha customer service and tell them this should never happen, and isn't a normal wear item, and should be covered by warranty.

 

Or you might just want to call another dealer.

[Rickstir51]

Yamaha customer service called they are going to get it taken care of. thanks for all the help will let you know how it turns out

[Flyinfool]

I would find a dealer to do the work other than the one that you just got into trouble by going over their heads. I guess I am just eternally skeptical.

[Rickstir51]

I would find a dealer to do the work other than the one that you just got into trouble by going over their heads. I guess I am just eternally skeptical.

 

 

found a different dealer but they are not open today calling first thing in the morning