appears to be an '83 to '86 Grand Prix judging from the listed tube-set and the look of that crank (which I've seen on an '78 JPN. bike also) .The gold head tube was out for a coukple-few years; other names, #'s etc. might help; best I can do. Above average bike for it's day. So if it is what I think, what I just stated, the H. Bar & stem's been changed to the Flat-Bar. 555sl was like the second best tubing, it matters more than the precise year.