First there was a...frame??

Today I still want to show what the project beginn with.
A frame I picked up on a "xs400 parts tour" don't know where and when, but for years I pulled it across all corners of my garage when it stands in the way.
Now I think its time for show more attention for it.
Allover dirty cobwebbed and light rusty. But no problem, I took this^^
I seem to remember there was a matched engine to this frame but not sure. Got a car in the garage for sell blocking the way to many parts.

Here some pics of the frame I choose, a frame that waiting for years for attention:

This was for today...
-to be continued-