2.0l zetec, running cbr600 carbs, not modded yet, bike pump for fuel delivery, esc for ignition, running realy rich badly when cold,lumpy, wont pick up, better when engine warmed up, seems to be running rich when warm, but you can rev it up then, fuel into bottom of carbs, breathers at top, left open, any ideas guys, trying to get it ready for stoneleigh, thanks, andy

Idle mixture screws? See how far out they are, may need to out a bit more.

You really need to get an AFR meter on it to know what's happening.

On unmodded CBR600 carbs I'd expect it to be a bit lean if anything.
Have you balanced the carbs?

Stu

hi guys thanks for your input, looking at your post tonight coozer, think ill check my manifold plate for flatness, idle mixture screws (by the float bowl) ??.
whitstu, i thought it would run lean too, im looking into afr meter, not had time yet, lost my dad a couple of weeks ago, so lost some time, will try ideas tomorrow. thanks andy