Legally speaking, at least in NH, a motorcycle is defined as 2 or 3 wheels (all definitions in this posting are from that link). So 4 wheels is not a motorcycle, it is an OHRV or Motor Vehicle Moped is defined as, " 259:57 Moped. – "Moped'' shall mean a motor-driven cycle whose speed attainable in one mile is 30 miles per hour or less; if an internal combustion engine is used, the piston displacement shall not exceed 50 cubic centimeters and the power-drive system shall not require the operator to shift gears." For the Slingshot; An "autocycle", a 3-wheeler with a steering wheel, is also deemed as a motorcycle except that it must also have seat belts. All definitions obtained from Justia NH Law.
Keep your hands off my possessions - car, truck, bike, mower, house, whatever. No touchee unless you ask first!