My 2 cents says replace the filter and have look to see if there is any rust to care about. If the AllBall pump is specified for your bike (so you know it fits into the holder, etc). I'd consider having one "in stock" so that somebody could ship it to you, in a pinch.I recently purchased a 2017 650 XT with 20,000 miles on it. I will be making a 2500 mile trip through Mexico and want to be prepared for any fuel system problems.
1) Should I change the fuel filter or just carry a spare?
2) Should I get a spare fuel pump? It looks like the choices are the entire OEM assembly, or All Balls has a kit with just pump and filter (P/N 47-2032). (Not sure about the All Balls filter as it doesn't look like the part in the Suzuki catalog.)
3) I am going through the bike thoroughly, but are there any other spares I should be carrying?
I also notice that RevZilla has a sale going on for fabric fuel bags.
They are small, light and pack well when you don't need it _ but if you are exploring out on the edge or worry about getting lost. You can't fake gas. ;-).