Guam does not have specific laws setting maximum decibel levels for small vehicles. However, federal regulations established by the U.S. Environmental Protection Agency (EPA) under 40 CFR Part 205 set noise emission standards for transportation equipment, including vehicles. For instance, motorcycles manufactured after 1983 are required to meet a noise limit of 80 decibels, measured under specific test conditions.

While Guam may not have its own vehicle noise regulations, federal standards still apply. Additionally, local authorities might enforce general noise ordinances to address excessive vehicle noise, especially if it constitutes a public disturbance. It’s advisable to consult local law enforcement or the Guam Department of Revenue and Taxation for more detailed information on vehicle noise regulations and enforcement practices in Guam.