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.
The laws for riding a motorized bicycle in New Hampshire made simple. Know the requirements in your state so that you don't break the law!
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