I'm just putting my Targa back together. Decided to check the floats because I had a problem with them leaking whilst in Italy and they were replaced with new. Both new floats were full of fuel and the engine had only done 1000 miles (give or take).
There was something on facebook about a batch of defective floats and if you've had a new Dellorto carb in the last year or so I suggest you keep an eye on it. I've swapped my white floats for black ones.