That was an engine!
Years ago a group of italian passionates shipped their "Falcone" to the USA and toured for many days around the States. It happened that they had to change the piston of one of the motorcycles in a camping ground "en plain air" and after that the engine started at the second kick start!
I had a video tape about it , unfortunately it got lost during one of my move!
nice to see this photo, suggestive!
robert