Spilling gas from breatherhose
 

Hi

my XTZ is spilling gas from the gastank-breatherhose for a while and the dealer hasn't got the right sollution so far ...

Perhaps anybody here has a sollution.

When my bike is parked in the sun for a while, drips of gas are spilling from one of the two tankbreatherhoses. If long and sunny enough, a small stream is under my bike :-(

I;ve asked the dealer to look at it. At first the dealer used pressure air through the hose (in to the tank) thinking a pressurevalve was not working correct. Well that didn't do anything.

Went back to complain and show the still dripping hose.
Then they contacted Yamaha Holland, and after consulting them they gave me a new gastank. Happy with that service, but....

it still spills, even more than before... Only when parked in the sun.
Went back to complain. Now they investigated furder and they found the gastankopening was a bit rough. They suspected that because of the roughness, gas could be pressed up in to the upper breatherhose when pressure in the gastank rises because of sun-heat. So they pollished that plastic part, again after consulting Yamaha Holland.

And now, it still spilllllllls.... Damn!

Does it only do spill out of the breather when the tank is full? Or does it do it regardless of the amount of fuel in the tank?

I see yours is an ABS Ten. They have a completely different tank, much higher with a bulge at the top around the filler cap and a different shape round the front where the battery sits. I am not sure whether the breather exits in the same place as the "normal" bikes, or whether it is in the same position internally? Can you say where it exits, or show a picture?

I suspect maybe the ABS models are more prone to this fuel expansion problem? If they have the same size filler (same part number) neck as the standard bike then, because the higher raised area around the filler, the air space left to accommodate expansion will be much smaller when the tank is filled to the bottom of the neck? Haven't heard anyone with this problem before though...

Yes it's an abs version.
It doesn't matter how much gas is in the tank; full organisatie almost empty: it spills

"Filler" is the word I was looking for. That is what they've polished.
The breather is located Just below the fillercap.

Very odd?

I would have said there was a leak internally in the breather pipework, but as you've had a new tank, that seems unlikely? If it only does it in hot sunshine them it can only be fuel expansion, or fuel vapour/pressure build-up from evaporation. Even this doesn't sound possible if it does it with a part-full tank?

Try this... Leave the bike in the sun with the filler cap loose - not locked. See what happens and report back.

Will do!

Sidenote : I don't know what parts they re-used from the first tank. Could be the pipes haven't been replaced. ...

As requested a picture of the inside:

http://i40.photobucket.com/albums/e2...psyfjmy181.jpg

That's a completely different system to my 2008 non-abs Tenere. It looks like the opening relies on sealing against the tank cap and venting through the small hole in it. I suspect you filler cap assembly is at fault and this hole is block or has not been drilled properly. This would explain why a new tank didn't cure the problem as they would almost certainly have used your old filler cap.

Try leaving it in the sun with the cap loose like I said. If it doesn't spill out, then I'd suggest a trip to the dealer and get a new filler cap assembly fitted under warranty.

Well this week was, oh so sadly, short of sunshine :-(
but the two days it was sunny showed no spilling :-) (with cap closed by the way)

I realy hope is stays like this. Will report back if it changes

Wel that s#cks.

It keeps spilling any way. Less then before, but it spills..... On top of that my fuelgauge is not getting any info since the dealer polished the filler; it says it's completely full but I could get 22,5 liter in.

I feel like everytime I go to the dealer they mess up something else.

Had a clear and annoyed conversation with the dealer and told them to fix it right for once. No trust in their capabilties anymore.

The only way fuel can come out the breather is if
the end is in the fuel, not the air space above the fuel...
so my thinking is that it is two long.....
remove it have a look at it length....

Well, it has been a while since I updated this post.

The gastank kept spilling and in august I went back again to the dealer.
Bike was there for two weeks and they said it was fixed.
Back home after pick up and after an hour being parked out front, ... still drippin' AAAAH. How could the've not seen that I wondered...

So, I wrote a letter to Yamaha Motor Netherlands with a complaint about the bike and the dealer.
Yamaha responded very correct and they offered to take the bike in for a closer look by themselves. They also made possible I switched for another dealer.

With transport and all, it took them almost a month to figure out nothing was wrong..... What they did change was the fillercap to be sure. They realy had a go on it I am sure. but otherwise everything was checked, bike all around.
So I picked it up. First day the bike was back in my yard, you guess it; dripping!
So I've called the case-mechanic straight away and told him this. He was in aw and didn't know what to say. A 1000 appologies and again the offer to take my bike in. This time I got a demo XT660Za (explorer) for the time being.

NOW it gets realy weird: The demo bike was parked at the same spot in my yard, and yeah.... IT LEAKED!!!! 1600 km old... Same hose, same leak. F#ck!

So, I took pictures and send them to Yamaha where they were investigating my bike. The responded that my bike hadn't dripped a drop since it was there and that they almost couldn't believe the fact the demo was also leaking at my yard. They didn't know what hit them.

So, now what...
Now after again 2 weeks they've concluded there is nothing wrong with my bike, OR the demo XT. It seems that where and how I park the bike(s) in my yard, in the sun, an exceptional situation is created where the breathingsystem spills more than it should without being anything wrong with it...

So, an XT660Za parked on the centrestand can, under the right (or wrong) conditions, spill gas from the breatherhose. Due to the breathersystem and pressure by warming up it can but only in 1:100000 cases orso....

But HEY! I still LOVE my XT and frankly I am glad it is back.
(sorry for my English)

Amazing!