Regarding the center-stand.........I don't know when by the number, but if I remember correctly, the height of the stand changed. When I lifted my very early sandcast onto the stand in 1969........it was relatively low effort and barely lifted the tire off the pavement. Also, I have noticed this in the past few years.............the actual width of the attachment ears or the lugs on the frame are slightly different after K1..............you may want to fit yours before painting.