Then it would behove you to read at least these two clips I have extracted on my previous post on this subject as I too also used to live in NH until I moved here 11 years ago when I retired.
Motorized Bicycles in New Hampshire Mopeds are a great way to save money, get some exercise and have some fun while you do it. New Hampshire's DMV (Division of Motor Vehicles) recognized the increasing popularity of motorized bikes and created the following laws and requirements for them...
www.motorizedbicyclehq.com
According to New Hampshire Law a motorized bicycle is classified as a moped. The fit within the definition of a moped your bicycle: must have an engine of 50cc or less. cannot exceed 30mph on flat ground. cannot shift gears. cannot exceed 2hp...
motoredbikes.com
This was from the post I made on this subject, post #13.
New Hampshire has powered SOLELY by human power in their bicycle classification... https://www.nh.gov/dot/programs/bikeped/documents/MV-BikeLawsSummary1.pdf
motoredbikes.com