[adouglas]

By "an issue" do you include all that can go wrong with a bike? Transmission? Fuel tank? Suspension? Ignition?

Of course not.

Carburetors play the exact same role as FI. They meter fuel. They do not play a "more significant role with the engine and function of the motorcycle."

Note that carbureted Ninjettes have been around a whole lot longer than FI bikes. There are many more of them, they have much more mileage, and they're older. So there's some selection bias going on here... of COURSE you're going to see more issues with carbureted bikes. Check back in in 15 years and see how many problems you have with aging FI bikes.

Having said that, if it ain't there, it can't break, right? Being more complex devices than fuel injectors, they are more sensitive to poor maintenance and neglect. You may note that most of the issues you'll find are related to the bike being parked for a long time, with fuel going bad. That's not the fault of the carb, nor an inherent weakness. It's the fault of the owner not treating his/her machinery properly.

A fuel injector can get clogged too. But without the nooks and crannies you find in a carb, they're easier to clean by running some fuel treatment through the system.