No person shall drive any motor-driven cycle in the night time at a speed greater than 35 miles per hour unless such motor-driven cycle is equipped with a lighted headlamp or lamps which are adequate to reveal a person or vehicle at a distance of 300 feet ahead.
N.H. Rev. Stat. Ann. § 265:65
Special Speed Limitation on Motor-driven Cycles
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.