I am thinking about my '18 Heritage 114 going to tubeless and non-spoke front wheel. Do the new solid wheels interchange with the 2018?

 

don't see why not

 

You can convert spoked rims to tubeless. There are how too videos on youtube to show you how to do this.
Get your bike's wheels trued and then convert them to tubeless. Probably vastly cheaper than getting a new set of wheels.

 

yes, I already did the rear tubeless 4yrs ago. they have lasted 60k so far. from the looks of the wheel price $600+, I will seal the front with the 3m product. thanks.