Jake I'll be honest with you, when I saw this pipe I had to have it cuz it looked so cool. But with my very ported 70cc Airsal, 20mm Delortto carb, and 18-36 gearing, this thing really kicks in best at 50 mph.
It is a quiet pipe til you pump up the volume on the RPM's.
On the down side, you can't use the normal kickstand and you lose use of your pedals too.But worth the trade off to me. It's Still a PUCH.
It was a blessing to me to lose the pedals, cuz it opened up the gearing game with the Tomos rear 5 star, PUCH look-a-like mag. I ran 18-28 gearing with my ZA50 ;-)