A manufacturer or a retail vehicle dealer of motorcycles or mopeds or both may indicate on the retail vehicle dealer's registration application a preference for a general distinguishing motorcycle number and plate for its vehicles. A motorcycle registration is a valid registration on any motor vehicle owned by the dealer.
N.H. Rev. Stat. Ann. § 261:112
Application for Motorcycle and Moped Registration; Validity of Motorcycle Registration
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.