The full comp endueo version was identical
No mythical speeds with them, but hard work to ride with that teensy power band.
Thesere's also a
160 version I remember they were quite wicked in their day.
The 500's motor does look a bit familiar, there was a Chinese built enduro/crosser a few years ago with a similar motor. If so doesn't the same factory also make motors for BMW and Suzuki or Yamaha??