From what I have heard about removing Tomos carbs, you have my simpathy.
The only way you can make an engine run fast is to give it fuel (gas and air mix). Chances are good that your throttle is stuck open just a little bit.
Turn the idle screw out and see if anything changes. If not, you are going to have to pull the carb again and look at it to figure out why it is not closing all the way.
Someone else who is a Tomos expert may have a better idea.