please forget everything you think you know about carbs, you will break your bike. your bikes lovely, put it back together and leave it
yea it was harsh but its for you own good mate, you obviously aren't an expert as youve said yourself, so either leave it or get someone who knows what there doing to have a play with it.
Iv got a pack of 10jets that will fit a 12mm gutner carb if your interested (if speedfight2 run 12mm gutners standard)