This is a pretty simple adapter to make it more easy to mount universal indicators on Yamaha 125cc motorcycles.
I tested it with my Yamaha WR 125 X, and i can confirm it works with Yamaha R 125 and MT 125 models up to at least model year 2013.
There is a version with a slit to put the cables trough as well as using a 3mm socket head hex screw to clamp down on the indicator thread, aswell as a version without this slit.
The author marked this model as their own original creation.