Originally Posted by badger1

Six of one, half dozen of the other.

The '17 Roam 0 is a much nicer bike than a '19 Roam 2, as a bicycle. If you were planning on using it as such, probably worth the saw-off to make the switch. But if you plan to modify your bike to turn it into an underpowered motorcycle anyway, it will really make no difference in the long run, so I wouldn't bother.