need service/tune-up spec's/carb adjustments etc.?

Question

My bike is 1982 Yamaha XJ750 Maxim

Answer 1

Sorry, there's nothing on the web and Yamaha doesn't provide them (Kawasaki does).
The first thing that anyone with a motorcycle who works on their own bike should buy is a shop manual. No more asking questions on message boards hoping the info is correct. You've invested so much time and money on your precious machine. A couple of $$ ain't gonna put you in the poor house.
http://www.motocom.com/motorcycles/