Use stabilizer. Keep the tank full to prevent condensation. After using
the generator before turning it off, disconnect the load, let it run
unloaded a couple minutes to cool off then close the tank valve and let
the carb run dry. Once a year if the generator is used infrequently,
drain the tank and put the gas in your car to use up. Refill the tank
with fresh gas with stabilizer. You should not have any problems this
way, certainly I haven't.

Pete C.

The problem isn't getting the gas to the engine. It needs to be fed into
the engine at the right mix and even if you solve that adequately your
engine has no built in capability to be tuned to run properly on gas.

Newer versions of your engine come with a plastic gas tank that might be
fit onto your engine. You can install an inline fuel filter to keep dirt
out of the carb.

-jim

I own 2 bikes, a 1980 CB750K and an 81 CB750C and am familiar with
the problems of gas tanks rusting, as this is a common issue with bikes
that aren't run frequently.  Incidentally, I have not had that problem with
either of my bikes.

You may have been running it periodically but you wern't running it long
enough.  What you need to do to keep a metal gas tank from rotting out
is to start the generator, then run the gas tank dry.  Then turn off
the fuel line to the carburetor, and fill the tank up with fresh gas.  Then
you can let it sit a month and turn it on and run it dry again, then turn
off the gas and refill the gas tank.  Repeat indefinitely.

No need to use fuel stabilizer if you do it this way.  Gas has stabilizer
in it when you get it from the pump, it's part of the additive package.
You only need stabilizer if your going to let a half-full gas tank stand
for months at a time.

Needless to say if your engine does not have a fuel valve between the
carburetor and the gas tank you need to add one.

Ted