thanks Kc, thats good reading! he claims it was blue-green like my K1 though. i didn't even know they used that color on another model bike, but my dad has a great memory, I am inclined to believe its a 1970 K3. the seat looks the same as the 1970 in the link you provided. I think for his sake I am going to be painting it the same color as mine as it sparked his memory. now to plan out details, find a bike, and restore it! gonna get the whole family in on this. only 8 months to go. much work to do! does anyone have any good threads on cb450s to direct me to? I'll be researching anyway but it doesnt hurt to ask. problem areas, etc?