First things first.
Hawaii defines a
motor scooter as a two-wheel vehicle with an engine under five horsepower. Thus, if it has a four-stroke engine it automatically falls into the scooter class. Of course, some scooters have more horsepower and still carry many scooter features.
Hawaii puts these vehicles in the motorcycle category.
Thus, if you mod your Vespa too much, you might end up in a different category of vehicle. Not that this matters much.
In Hawaii a motor scooter must go through the same registration process as a motorcycle.
Also, the laws for scooters and motorcycles are essentially the same.
This means to ride a scooter in Hawaii you must obtain a motorcycle-class license, wear a helmet, and have the proper insurance.
Perhaps that explains why the ad states...
'we were riding it and just stopped using it, we don't need it and it just sits around.'
Many people automatically think you don't need a license for a scooter, in most states this is not true.
And they go out and get one and one day they DO get pulled over, that's when the surprise starts.
Even if you THINK you can pretend it's only a 50cc, the cops WILL pull you over and one look at the VIN tag...
At least once in the next year, trust me, I know.
You HAVE to have everything proper and legal or they'll tell you to take it off the road.