More differences between the pre-mass production models and 00001-004?? Another air box shot, Horn mount has only one bolt, Swingarm has a bolt instead of a rubber plug in the oiler, and front brake arm.
I think the preproduction prototypes were 350s. What I am calling prototypes are the early hand produced machines that were sold in the States. Some sample differences are below. The K instead of Kawi spelled out in the side covers, right hand shift spline in the clutch cover.