+ tedgina: 2 quotes from you:
"It is fuel injection so it is very soon that the new fuel goes in also it was running perfect for the last 200 miles......" -----> BMW K 100?
"well i can only say that the older bike made in 1984 that has carbs ......" --> BMW R 100?
On my 1983 BMW R 80 G/S Paris-Dakar (sold last year with 150.000 km) the valves & valve guides
where changed to resist the unleaded fuel. The rubber fuel lines and the carbu membrans where changed to resist the ethanol. If you don't do that then you can have problems with "modern" fuels in older bikes. That time in Germany you had badluck I think.
ps: I am pretty sure that a steamtrain runs better on destilled water
.