Steen was a company that specialized in smaller-sized custom racing frames; sort of a modern-day Rickman. (If you can call the '70s modern.) They could be ordered with a multitude of different motors thru 'whatever' dealer. I had two of them when I started flattracking as a teen. The first was with a Hodaka 100cc motor; and the second had an XL250 motor. They were basically a smaller version of the Champion and Trackmaster frames of the day.