The SMX League officially announced their new sound rules which go into effect at the start of the 2027 racing season. The new 109-decibel maximum sound standard is implemented in the 2027 AMA Supercross Championship Rulebook and will take effect beginning in January with the start of the 2027 Monster Energy SMX World Championship season at Angel Stadium in Anaheim, California. The current AMA sound limit of 112.0 dB will be reduced to 109 dB, a 3 dB decrease. This means all bikes subject to sound testing will need to meet the new 109 dB limit in order to avoid a penalty.
For the 2027 model year, all manufacturers have worked to make their bikes compliant straight off the showroom floor. The implementation of this new sound rule is aimed at a broader goal “to develop motorcycles designed with lower sound output levels as part of a global effort promoting more access to off-road riding and racing areas in North America and around the world.”
“The AMA is proud to support a standard that reflects strong stewardship of the sport and its future,” said Mike Pelletier, Director of Racing, American Motorcyclist Association. “This effort brings key stakeholders together around a consistent competition requirement while reinforcing responsible practices that help protect access and opportunity for the sport over the long term.”
“Together, these efforts reflect a coordinated investment in the future of off-road motorcycle racing, one designed to preserve access, support strong event execution, and create a sustainable foundation for continued growth,” further commented Kevin Crowther, Chief Competition Officer, AMA Pro Racing.
TEAM STATEMENTS
“Supporting the long-term health of our sport means taking responsible steps that help protect riding environments and strengthens the future of competition,” said Roger De Coster, Motorsports Director KTM North America. “This alignment improves efficiency for manufacturers, teams, and riders competing internationally.”
Derek Brooks, Sr. Mgr. Motorsports Business Management, Yamaha Motor Corporation, U.S.A. added, “The adoption of the 109 dB standard reflects a thoughtful, collaborative approach that helps ensure the continued growth of the sport while maintaining the high level of performance riders and teams expect from Yamaha.”
“Honda has always been committed to making a positive impact on society, so we’re happy to produce motorcycles that comply with the updated 109 dB limit,” said Brandon Wilson, Manager of Racing and Experiential at American Honda. “In addition to helping to protect the future of our sport, this move allows for a more streamlined approach to development and production through a single global specification.”
“We understand that the long-term success of our sport depends on responsible practices that protect riding environments,” said Dan Fahie, Senior Manager Racing, Kawasaki Motors Corp. “This updated standard represents a balanced approach that supports both competitive performance and environmental responsibility.”
“Suzuki recognizes the importance of reducing sound levels while also addressing concerns in the communities surrounding motocross riding areas and racing venues,” stated Chris Wheeler, Motorsports Manager, Suzuki Motor USA. “Lower sound output is expected to provide the greatest benefit at longer distances from the track, helping improve the experience for nearby residents.”
“Ducati has always viewed competition as a platform for innovation, development and responsibility,” said Paolo Ciabatti, General Manager, Ducati Corse Off-Road. “Supporting the 109 dB limit means contributing to a shared path that looks to the future of our sport with a spirit of collaboration, technical excellence and respect for the environments in which racing lives.”
“Triumph is committed to supporting the long-term future of off-road competition through responsible innovation and close collaboration with our partners across the sport,” said Jeremy Coker, General Manager – Triumph Racing America. “The 109 dB standard reflects a balanced approach that supports performance, global alignment, and the continued accessibility of our sport for riders, organizers, and local communities alike.”
