Slight hold on last post. I ran a short ride night before last and limped home on 1 and 2 cylinder.
Traced problem to no fuel coming from the Tap tube feeding 3 and 4., Tank off Tap off clean everything
blow out everything, put on new fuel pipes,(in case a spider was left in the original pipes).
Ran ok ,only in drive way,but of course bowls were full, same problem tonight only 1 and 2 cold ,i had switched the pipes on the tap..
Just taken tank off again ,this time put tap on reserve and fuel isn't coming out of the front pipe,if i put my finger over the back one with fuel coming out fuel then flows from the front pipe si it isn't blocked just seems to be some sort of vacuum being formed.
If no one has any idea it looks like DS will be getting another £50.
Cheers Rich