Thanks Joe, have had a look at the crank seals, no leak there. What i did notice though was that the carby body leaked a small amount of petrol. The g3 carby is made up of 2 halves separated by a gasket. I changed the gasket, lapped the carby, tightened the 2 screws as much as they could go but a small amount of petrol is still getting out which means there is a small gap there, could that be the air leak? I can't tighten the screw anymore, what can you do to make it air tight?
