Motorcycle Repair: first start of the year, cause havoc, tiny particles

Question
1982 Yamaha XJ750J Maxim.
I left the bike in storage over this last winter, the entire previous summer and the winter before that. I didn't drain any fuel out or add stabilizer to the fuel (I know, I'm a terrible human being). The fuel tank is over 3/4 full with old fuel. I did change the oil when it first went into storage. I have charged the battery and it seems to work fine. The bike won't start now. It turns over, but won't do anything else. What can I do and how?

Answer
Brad,
 You most probably have a layer of varnish over all caburator components left by the evaporated fuel.  You are going to need to clean and adjust them properly.
 Here are some basics guidlines on setting up and cleaning them:
Be absoulutly sure all orrifaces and jets are clean and not damaged. Use ONLY compressed air and solvents to clean these, using a pick or wire could damage the precise venturi action that takes place. Carburators can get pretty complex and require tuning from time to time. In addition there are different systems and effects that come into play at different throttle positions. Performance can be fine at one throttle position and terrible at another. All you can do is look closely for damage and carefully adjust all tolorances according to a good service manual. Do not overlook the float level and condition of the needle valve (that it is not sticking), be very sure you are not starving for fuel. In relation make sure fuel flow is unobstructed and use a good in-line fuel filter from the tank to the carb. Even tiny particles in the fuel can get logged in critical areas and cause havoc.

Hope this helps,
Mike