I have seen on YouTube that some folks in Japan are running this conversion. I don't hate the chain maintenance on the CT125 enough to want to convert it. IMO the kit would do well paired with a belt enclosure to keep stones out, and a belt roller tensioner. Belts are great between two cogs that are always the same distance apart, like electric motorcycles where the front cog is at or next to the swingarm pivot, or the primary drive between engine and gearbox on Harleys. Something that's a pain on bikes that aren't designed for belts is that you often have to partially disassemble them to install a belt. Keep in mind that a chain can be broken and then made into a loop again with the master link attached, a belt cannot, so you have to maneuver a closed loop into place.