That's the thing, that isn't anything special. Yamaha only published full service manuals every 3 or 4 years. Models in between that got little supplements outlining any changes to them. They were made to be used with the last full manual. They were published separately so if you had an older full manual, you could just buy the supplement to use with it. But, they also did newer printings of the full manuals that included the supplements in them. That manual I posted the pic of has the full E model manual in it along with the F, G, and H supplements. To me, it's the ultimate '78 and later model manual. It covers all aspects and changes to those models. Granted, it doesn't have any info on the '82 J and '83 K models, but those are pretty much the same as the H model with just some cosmetic differences. And the best thing is, I only paid $10 for it, lol.