I have a K-5 It came with a title that said it was a 73 year model. Turns out I need a new title because at some point the DOT was told the bike had been "junked". I got it bonded and a DOT dude came to inspect it. (It's torn down to the bare frame) Date of manufacture is 10-71 and the frame # is 500####. Now he needs a rider for the bond that states 72 instead of 73. I have not been able to locate the serial # / year model info I have seen in the past. Any help locating the info or your knowledge would be great. No more untitled bike for this guy.... Even if it was free!