N.H. Rev. Stat. Ann. § 265:1-c

No state, county, or municipal law enforcement agency shall engage in motorcycle profiling. In this section, "motorcycle profiling" shall mean use of the fact that a person rides a motorcycle or wears motorcycle-related paraphernalia as a basis for deciding to stop and question, take enforcement action, arrest, or search a person or vehicle under the United States Constitution or the New Hampshire constitution.