Just wondering how loud the tomos moped tecno circuit performance pipe is, compared to stock? I'm looking for good performance without all the noise. I'm considering the tecno estoril performance pipe. According to Treats HQ it's what i'm looking for. Of course an up jet will be in order either way. Guess I have to crack open the carb. again to be sure of the size. Anyone have a recommendation? How bout an air filter that will fit nicely in the air box void under the frame? I will continue to read up on the subject, and I'm sorry if this question has been asked a thousand times. If so, point me in the right direction? I'm still learning. Thanks.