61-9-418. Motorcycle noise suppression devices. All motorcycles or quadricycles operated on the streets and highways of this state shall be equipped at all times with noise suppression devices, including an exhaust muffler, in good working order and in constant operation. In addition, all motorcycles and quadricycles operating on streets and highways shall meet the following noise decibel limitations, on the standard A scale, such decibel limitations to be measured at 50 feet distant from the closest point to the motorcycle or quadricycle:
     
     (1) any cycle manufactured prior to 1970          92 db(A)
     (2) any cycle manufactured after 1969 but prior to 1973          88 db(A)
     (3) any cycle manufactured after 1972 but prior to 1975          86 db(A)
     (4) any cycle manufactured after 1974 but prior to 1978          80 db(A)
     (5) any cycle manufactured after 1977 but prior to 1988          75 db(A)
     (6) any cycle manufactured after 1987          70 db(A)

     History: En. Sec. 1, Ch. 398, L. 1973; amd. Sec. 1, Ch. 179, L. 1974; amd. Sec. 1, Ch. 273, L. 1974; amd. Sec. 1, Ch. 54, L. 1977; R.C.M. 1947, 32-21-105.1(2); amd. Sec. 46, Ch. 516, L. 1985.