Dealing with the Sito Plus drossel for more power
If you've just picked up a Sito Plus exhaust for your scooter, you've probably noticed that the sito plus drossel is holding back all that extra "oomph" you were hoping for. It's a common situation—you buy a performance exhaust that's designed to look like the original part (the classic "sleeper" look), but out of the box, it feels almost as restricted as the stock pipe. That's because these exhausts are usually sold with a restrictor, or "drossel," to keep them street-legal and compliant with noise and emissions regulations. ...