7743 - Mufflers and noise control.
§ 7743. Mufflers and noise control. (a) General rule.--It is unlawful to operate a snowmobile or an ATV which is not equipped at all times with a muffler in good working order which blends the exhaust noise into the overall snowmobile or ATV noise and is in constant operation to prevent excessive or unusual noise. The exhaust system shall not emit or produce a sharp popping or crackling sound. The sound intensity produced by a snowmobile shall not exceed 82dbA when measured in accordance with SAE Recommended Practice J 192 Exterior Sound Level for Snowmobiles, as amended. The department may by regulation adopt more stringent noise requirements for snowmobiles. The department shall by regulation adopt noise requirements for in-use operation of ATV's using measurement procedures in accordance with ANSI/SAE Recommended Practice J 1287 March 1982, Measurement of Exhaust Level of Stationary Motorcycles. The sound level intensity produced by an ATV shall not exceed 99dbA, or decibels, when measured at 20 inches. (b) Modified mufflers prohibited.--It is unlawful to modify a muffler or to operate a snowmobile or an ATV with a modified muffler so as to increase the sound level of the snowmobile or ATV above the level allowed by this section. (c) Exception.--This section does not apply to organized races or similar competitive events. (July 11, 1985, P.L.220, No.56, eff. 60 days)