Released this morning, the 2027 AMA Supercross Championship Rulebook includes a new 109 dB maximum sound standard for professional off-road motorcycle racing that will take effect beginning in January with the start of the 2027 Monster Energy SMX World Championship season at Angel Stadium in Anaheim, California.
Developed in collaboration with the series manufacturers, the SMX League, AMA Pro Racing (AMAP) and the American Motorcyclist Association (AMA), the new standard establishes a unified competition benchmark while supporting the long-term viability of venues, local motocross tracks and riding areas across the United States, and the communities that host them.
The current AMA sound limit of 112.0 dB will be reduced to 109 dB, representing a 3 dB decrease. Research indicates that this reduction will provide meaningful benefits in reducing sound impact beyond the track itself.
The updated standard is expected to deliver practical benefits across the event environment, including improved communication within stadiums and venues nationwide, a more balanced in-person experience for fans, and a stronger broadcast presentation for audiences watching at home. It also provides teams, racers, and manufacturers with a common target as they prepare for competition under a consistent global sound requirement.
