This piston came off of a 1975 Yamaha DT 400. It is a wiseco piston at 85.50.

It comes with pin, bearing,piston, one clip, and used rings

See the pictures for condition and what you will be getting I don’t know if the rings are still usable or not and it is missing one of the two clips.

The last picture shows new rings that are available for this if needed. New gangs did not come with it.

This should fit 1975 to 78 Yamaha DT 400 and MX 400