Popular misconception that yamaha parts are made by yamaha and only used on yamaha bikes... Especially with brakes. Yamaha bought brakes to fit their bikes (or designed parts for those parts to bolt to) from brake manufacturers, they never did very much in house. Some people think Yamaha made every part including bolts and seals etc. And we know pistons are by ART, seals by ARS etc etc.
So, this is a Nissin part I guess from the link and as such could well have been fitted to many bikes.