Quieting scooter down

[sc00ter]

When I first starting tuning 2 strokes I ended up with a loud expansion chamber exhaust. I didnt exactly conform to the neighborhoods wishes to "be quieter" and starting getting the sidewalls of my tires slit. Never caught the person(s) responsible but eventually put something more quiet on it, and parked it in the back of my van.

[Irish]

Originally Posted by sc00ter

When I first starting tuning 2 strokes I ended up with a loud expansion chamber exhaust. I didnt exactly conform to the neighborhoods wishes to "be quieter" and starting getting the sidewalls of my tires slit. Never caught the person(s) responsible but eventually put something more quiet on it, and parked it in the back of my van.

Expansion chambers make a HUGE difference if you are tuning a tuned two stroke. Unfortunately they are VERY loud & you can't have your cake & eat it too! Basically they suck the fired exhaust out of the engine & allow it to turn a higher RPM! Irish

[sc00ter]

I have had good luck with just adding a street 70cc bbk and jetting to a pretty much stock motor, including stock exhaust, without to much more noise. Plus, the police in the know wont ticket you for a expansion exhaust. But, as always happens, I end up tuning it to get "just a bit more" out of the bbk. Believe it or not, but sometimes the intake system can be just as loud as the expansion chamber! Joys of a 2 stroke.