smoking lammy

[neilcoulam]

hi guys, could anyone help me please, i have just rebuilt my S2 lammy 225 engine, new bearings seals and gaskets, when i first started it it smoked really bad, so i stripped it down again and fitted a new drive side oil seal again, now it all runs fine until stop at a junction or lights then it smokes until i speed up and cruse at around 40, using 30 phbh 125 main, 55 idle, x2 needle on top, 40 slide and 70 choke, breather ok and when you put your finger over hole it dont suck or blow when reving engine, dont know what to do please help
Neil

[muppet]

mine was on a standard carb but was doing same until i changed my float which was letting petrol in would have been letting too much petrol through