Honda XR75
Here's a picture of me on my XR75 (ca. 1974) near State College, PA. Several of my friends had these great little bikes and we rode all the time. Note the "old style" of jumping here- rear wheel first. It was considered sure death to land front wheel first back then! (Note: I sold this bike in 1978 and don't have it or any spare parts!)
Two more photos I found in a photo album (and to think that today I get on my daughter about not tucking her shirt in...):