Closed throttle snatch (ooh err)

[Billythekidd]

Right, my slabby track/race bike has a K slingshot motor in it, still running the vm 29 carbs from the slabby though, problem is, when I get to a corner, close throttle bang it over on its ear then when I try and gently feed in the throttle it snatches and unsettles the bike right at the worst time, I have balanced the carbs but they were pretty good anyway, what should I start with, the pilots or mixture screws?? 

[Duckndive]

[Billythekidd]

Ideal, we'll looks like I need to have a look at the pilot jets and mixture screws.