hi,and welcome from spain.I cleaned the carbs out about three weeks ago specificaly because of this. The float needles didn't look bad at all, but the problem remains. I didn't strip down the carb completely as I am not as experienced yet. Hence my enquiery
can you first update your signiture line,include your location in south africa,and your bikes details.
here is a link you can follow to re-clean your carbs,there are a few bits that you need to remove to stand a chance of it working.
plus a newbie present for you
on a side note........you into the rugby?