My 95 heritage nostalgia is running great but, is only drawing fuel from the left side tank. The left tank goes empty as the right side stays completely full??

Check the steel fuel line under the intake manifold
had one that was almost completely clogged shut with ****
took a month of hunting but found this to be the problem

hello sir,routing fuel line for craftsman,homelite,ryobi,hedge and line trimmers,fuel tank under engine, looking at machine from rear, shall fuel line on left with filter attached goes to bottom port of carb, fuel line from right side coming out of tank with inside tip attached goes to bottom port of primmer bulb,top line on primmer bulb goes to top port of carb, fuel tank under engine,fuel line routing,looking at machine from left side, left fuel line coming out of tank(drain back only) goes to right side small port of primmer bulb, left side larger fuel line from primmer bulb to top port of carb, fuel line coming out of tank (larger line) on the right side with filter attached goes to bottom port of carb, when replacing fuel line it is very important to use the same ID and OD line the homelite takes a special line that is black in color and a bigger size,the bigger line is ID .08-OD140 small line ID3/32 X 3/16.when the lines dissolve small pieces will get in the carb clogging small passages and screen,it is advisable that you clean out carb,and use a new filter.hope this helps,any comments welcome,thank you. if the filter has broken off of the line half way that is where you will run out of fuel, ``

It could be the sending units. Just because they ohm check okay while sitting still and at the same spot on the resistor does not mean they are good. Something is telling the system to move fuel. What about the control module? Is it adjustable or just bad?

I would say you have problem in the tank with the fuel pump line. When you lean the bike on the kickstand all the fuel goes to the left side an covers the line which then creates enough fuel pressure to run the bike. If you filled the tank full it would probably run ok until the fuel level gets below the bad line.

remove the tank , empty it , remove fuel level sender, clean gasket and if still in good condition, refit with grease or a non hardening sealant(fuel proof)

the only switch i can think you are talking about is an inertia switch.
It is located in passenger side just above the floor,

The S-Type fuel pump is a complicated 'returnless-system' with an
electric pump on the right side and a 'jet-pump' on the left side
to pump fuel back to the right side. The tank is a 'saddle style'
tank with a 'HUMP' in the middle where the driveshaft goes so the
right side is the side where the fuel need to be to go to the
engine. Sometimes the left jet-pump gets clogged and even if the
gauge reads some fuel level other than empty, the right side might
be empty. You can pull the rear seat cushion and some cover screws
to get to both the electric and jet-pump covers to look into the
tank sections.....

enjoy your car

95 heritadge has two tanks. you have gas caps on the right tank and the left tank you fill them seperately.

You need to have it put on a machine for diagnostics. Because it could be any number of things on the service light. The fuel light switch on the inside of the tank has drawed moisture over the years and needs to be replaced. All gas tanks draw moisture or some gas just has some water content. By the way have you ever changed the gas filter? That may cause your engine light to be on and Oil change might too.
God Bless Greg