1100 overflow issues

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Slingervel

Pack Dog
Joined
Nov 22, 2012
Messages
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Bike
BMW R1150GS
Good day  :snorting: :ricky:

I need some help for a colleague of mine please.
His 1100 keeps on dripping fuel through the overflow pipe, even when the tank is not full.
When the cap is opened it stops leaking, iow it somehow builds up pressure in the tank causing the overflow.
I remember reading a fred with a similar issue, but can't find it.

Help appreciated.
:sip:
 
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