from what I have seen our bikes will last a very long time with no additives. I wouldn't like that stuff on my clutch for 1 thing and I never trusted any of that stuff Slick 50 or any other to not gum something up. The synthetics , if a good one is used such as Amsoil or the Mobil 4T, then I see no real need for improvement with an additive.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!