Ash,

If it has been sitting you may just need a float adjustment. You will have to check that often with a PWM/PWK.

No guarantees but I’d look there before getting into pumps & line routing. Especially if it ran ok in the past the way it is.

RPM

Floats would be my first guess too, but I’d start by inspecting the fuel line inside because it’s so easy to do. Flex the line a bit to see if there are any cracks. If it’s at all stiff, replace it. You may also want to look for any broken wires. Follow each one paying attention for cracks near connections and any rubs or pinches.

Need more info on your setup… Your carb may not even have floats!

If it happens instantly as soon as you enter a turn I would think carb. It would take a while for air bubbles to get up the line. Still good to change that line every now and then.

If its not the carb or fuel line it could be the coil wires. Tape the to the coil so cornering loads dont cause a short

It’s the pickup line in your fuel tank. If you pull it out of the tank you will see it’s hard as a rock. Replace it with new fuel line. Replace it every year.