I'm now back on the road.I completely drained the tank, filter and pump and then finally the float bowls; took the filler cap apart to get rid of the rust and tidy it up, filled it up with some fresh petrol and away it went. One hiccup within 30 seconds but afterwards was running cleanly for 10 miles.Does anyone want to buy 12.5l of what I assume is water contaminated petrol??!@
Learning: Don't leave the bike in heavy rain for a long period with only a few litres in the tank
Rigth, except that the seal isn't sold separately and the complete filler cap is around $350