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Excerpts from state statutes

Michigan


324.82126

For a snowmobile manufactured after July 1, 1977 and sold or offered for sale in this state, 78 decibels at 50 feet, as measured using the 2003 society of automotive engineers standard J192.

For a stationary snowmobile manufactured after July 1, 1980 and sold or offered for sale in this state, 88 decibels, as measured using the 2004 society of automotive engineers standard J2567.

Wisconsin


350.095

No snowmobile may be modified by any person in any manner that shall amplify or otherwise increase total vehicle noise above that emitted by the snowmobile as originally manufactured, regardless of date of manufacture.

For every snowmobile manufactured after July 1, 1972, and before July 2, 1975, the noise level standard for exhaust and engine noise shall be 90 decibels as measured in accordance with the procedures established for the measurement of exhaust sound levels of stationary snowmobiles in the January 2004 Society of Automotive Engineers Standard J2567.

 Except as provided in subd. 2., for every snowmobile manufactured on or after July 2, 1975, the noise level standard for exhaust and engine noise shall be 88 decibels as measured in accordance with the procedures established for the measurement of exhaust sound levels of stationary snowmobiles in the January 2004 Society of Automotive Engineers Standard J2567.

Minnesota


84.871

No snowmobile manufactured on or after February 1, 1972, for sale in Minnesota - except snowmobiles designed for competition purposes only, shall be sold, or offered for sale, unless it is equipped with a muffler that limits engine noise to not more than 82 decibels on the A scale at 50 feet.

No snowmobile manufactured on or after April 1, 1975, except a snowmobile designed for competition purposes only, shall be sold, offered for sale, or operated in Minnesota unless it is so equipped and has been certified by the manufacturer to conform to a sound level limitation of not more than 78 decibels on the A scale at 50 feet as originally equipped.

Except for organized events as authorized by Minnesota Statutes, section 84.871, no snowmobile shall be modified by any person in any manner that shall amplify or otherwise increase total noise level above that emitted by the snowmobile as originally equipped, regardless of the date of manufacture.