The top foto is thee 5th Knucklehead produced and painstakingly restored by Matt and his father Carl Olsen. Below is Matt and his 606th Knucklehead produced, Pretty kool huh?
here are their links, check em out.
Supposedly sometime after the first 400 Knuckleheads were made the early step cam covers were discontinued and the next 2 smooth cam covers were introduced.
got a Knucklehead ? send me a foto to post..