Right possibly problem solved
Drilled the slide and it now lifts like the other 3.
Found why no4 was filling with fuel, big bit of crap stuck in the float needle
So tried it again and it was still over fuelling, really rich and struggling to run until it was nearly out of fuel, then it ran great for a minute or so until it ran completely out of fuel
So carbs back off, double checked float heights, all ok, maybe they should be higher so jacked them up a bit to shut it off earlier.
It was only after a bit more interwebz research i realised the mistake i'd made
I'd forgotten to put the 4 rubber blanking plugs back over the pilot jets!
![Duh! :duh:](http://forums.banditalley.net/Smileys/banditalley/whatwasithinking.gif)
So, fortunately I hadn't put the carbs back on, quick off with the float bowls, reset the float heights to 15mm put the plugs back in and fingers crossed that should sort it out!