This, I believe, is a replica or customized bike. The paint and Porsche logos added to "look" like something Porsche would produce.
This one is a factory Bike S with the frame and forks custom painted purple. Looks pretty sharp.
This is a fake Porsche "folding" bike. I've seen this same bike with BMW logos. I do like the color though.
This is a real factory Porsche Bike FS with custom colors on display at Petersen Automobile Museum in Los Angeles.
And last, this is another factory Bike FS but looks like a custom paint job and matching seat. Another nice job!