How different are the bikes between 1980-82?

I ask because I have 3 service manuals on .pdf and 2 are for the 1980 model and the other is for 1982, but its a supplementary and doesnt show much of what I need.

the manuals can be seen here:
1980 XJ650G Maxim Owners Manual
1980 XJ650G Maxim Service Manual
1982 XJ650G Maxim Supplementary Service Manual

I have the 1982 Owners Manual, but its in Spanish... which is no bueno.

 

The 80-81 service manual is correct EXCEPT where the information is superseded by the supplement. The factory book for the 82-83 is the 80-81 with the supplement stuck in front.

They way you use it is to start with the supplement. If it's not covered there go to the 80-81 manual.

If I recall correctly (manual is in the shop) the supplement covers:

- Side stand safety circuit (new in 82) and new wiring diagrams and test procedures.

- Tells you that the 82+ cam chain tensioner is automatic so to disregard servicing it.

- Air assist forks (new in 82).

- Additional tool required for carburetor synchronization (YICS new in 82).

 

Don't forget the electric tacho for the 1982-up models.........!

 

But to do basic maintenance I have all the books I need

I also have the the Haynes book...

 

I gotta say I'm pretty impressed by Haynes' section on carbs; way better than the factory book in that area.