SMX League Adopts 109 dB Sound Limit for 2027
The 2027 AMA Supercross rulebook sets a 109 dB sound limit, down from 112 dB, aligning the U.S. series with the FIM MXGP standard. All SMX manufacturers have committed to compliant bikes, and Honda announced extra technical support for its privateer and support-team riders at the early Supercross rounds.
Timeline
- Nov 2 American Honda · press release American Honda Supports 109 dB Sound Limit for 2027 Season
- Nov 2 SMX League · press release SMX League Sets 109 dB Sound Standard for 2027 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…