Not in an injected bike. No need to.
The reason for products like Seafoam and Stabil are carbs. Let fuel sit in them for a month and it evaporates, leaving behind that horrible varnish. It gets in the jets and airways of the carb and you get a rough running or even non-running engine.
I use Stabil in all my carb engines that sit for a while between uses. Lawn tractor, lawnmower, weed eater, snow blower, and generator all get it. If I am not going to ride the Guzzi for a while I put some Stabil in it and run it around the block a couple of times.
Fuel injected engines do not let fuel evaporate in the injectors or other critical passages so no need for those products. But, I do like to use Chevron fuel because of the Techron additive.