I would have 2 concerns:
1, the bead of the tube type tire-- will it seat to the tubless style rim.
I know that it doesn't have to hold air pressure, but it does have to keep the tire locked to the rim when pressurized. I've not worked with tube type motorcycle tires/rims, so I don't know one way or the other. They may hold fine, but on the other hand......
2, is the valve stem hole in the rim large enough to accommodate the stem of the tube, location, etc without damage to the stem.....