ADLY MOTO GTA 50 Owner's Manual page 45

TAMPERING
Federal law prohibits any modification to the exhaust system which causes the
motorcycle to exceed the federal noise standard. Use of the vehicle with such a modified
exhaust system is prohibited.
Acts likely to constitute tampering include removal or puncturing the muffler, baffles,
header pipe, or any other component, relating to the exhaust system.
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