Thread: are motorcycles exempt from noise ordinances?
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Old 11-13-2007, 06:50 PM
ForcedInduction
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Quote:
Originally Posted by Matt L View Post
If four-stroke engines need back-pressure, why do the fastest engines out there run with no mufflers?
Backpressure for low end torque and drivability. Open exhaust for maximum high-end power.
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