Can you see the leak, its a little bit confusing from your description,
but my guess is that the "Y" joints on top of the tank are broken.  I
think there is a diagram in the bentley, but the hoses that go to the
expansion tanks comes from these Y joints, one on each side of the tank.

The good news is that it is not too bad to fix.  Just go buy the part from
the deal (~$30?) and buy a couple of the grommets too.  Then, struggle
like hell for an hour or two trying to feed it through the wheel wells.
Its a bit of a pain, but doable.

Blake

On Sun, 13 Jan 2002, Spencer Allen wrote:

> I've pickled my 85 Westy for the winter but think I may have some work to do
> next spring. The problem is with my last 3-4 fill ups there was gas leaking
> at the expansion tanks on both sides. Seems to be right at the hose to tank
> connection. This use to happen only on the side closest to the fill tube now
> both leak more than just a little. There was some earlier posts about a check
> vale of some sort. Any one have a fix for this? BTW why are there two of
> these tanks? Thanks all
> Spencer
> 85 Westy
>