Here are the motorcycle laws for Washington, DC:

• In the District of Columbia, motorcycle riders are required to wear safety helmet while riding.
• Washington, DC, has both sound level laws and muffler laws for motorcycles. A biker may not modify or amplify the sound coming from his vehicle, and motorcycles may not make sounds above a certain specified level.
• Lane splitting and lane sharing – in which motorcycles share lanes with other vehicles or drive in between lanes – are not mentioned in the District’s motorcycle laws.
• There are handlebar height restriction in Washington, DC. All motorcycles must have a maximum handlebar height of 15 inches at the time of inspection.
• Turn singles are not required on motorcycles, no matter what their model or year.
• A left-side rear-view mirror is required on all motorcycles although a right-side rear-view mirror is not required.
• Not only is using a police radar detector illegal, it is also illegal to possess a radar detector that is not in use.
• Eye protection, either in the form of goggles or a windshield, is required in Washington DC.
• Both a passenger seat and passenger footrest is required if a passenger is riding on your motorcycle.
• Bikers are required to use a daytime headlight, though modulating headlights are allowed.
• There are no restrictions on passenger age.
• There are no restriction on helmet speakers or helmet speaker use.