In the last few days I have purchased from Burlen and fitted a brand new pair of Amal 276’s for my 1950 C twin, beautiful looking carbs, seems a shame to use them. A couple of days after fitting them I started the bike, all ok, stopped it, went to start it a bit later, ticked it and much fuel leaked out of the little hole at the base where the big ‘union’ nut is attaches and wouldn’t stop leaking, this was the left side carb. My theory is that I over tickled it, either that or perhaps the float bowl was not completely vertical. Without altering the floatbowl I turned off the fuel tap and waited a bit before starting, took the bike for a spin and no further leaking. Personally, I wouldn’t look any further at this stage than reducing your tickle and see how that goes. I notice that the Rider’s Manual also advises that you only need to tickle the front left carb. My challenge at the moment is trying to get the mixture setting right.