2006 New Hampshire Statutes - Section 266:59-a Motorcycle Noise Levels.

    I. No person shall operate a motorcycle which has a measured noise level of more than 106 decibels on the decibel meter when measured 20 inches from the exhaust pipe at a 45 degree angle while the engine is operating at 2,800 revolutions per minute for one and 2 cylinder motorcycles and 3,500 revolutions per minute for any motorcycle with 3 or more cylinders.
    II. No person shall pass for the purposes of the inspection required by RSA 266:1 any motorcycle which has a measured noise level of more than 106 decibels on the decibel meter when measured 20 inches from the exhaust pipe at a 45 degree angle while the engine is operating at 2,800 revolutions per minute for one and 2 cylinder motorcycles and 3,500 revolutions per minute for any motorcycle with 3 or more cylinders.
    II-a. No person shall operate in this state any motorcycle which produces a sound level in excess of 106 decibels on the A scale, when measured in accordance with the provisions of the Society of Automotive Engineers Recommended Practice ANSI/SAE J-1287 annual report on ""Measurement of Exhaust Sound Levels of Stationary Motorcycles.''
    III. Any person who violates the provisions of this section shall be guilty of a violation and shall be fined not less than $100 nor more than $300.

Source. 1992, 94:1. 1993, 9:1, eff. May 25, 1993. 2005, 266:2, eff. Aug. 21, 2005.