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...

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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.

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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: