What rollers and jets do I need !!

Hi I hv brought a yasuni r exhaust for my stock Piaggio zip 50cc and I’m unsure what rollers and jet to put in I know you have to upgrade them by 10% but I’m unsure where to even find them

 

all depends on what you've got stock when it comes to the jet. As for the rollers i'd recommend buying a set of varying sizes between around 4 and 6 and starting high and working your way down until you get what you're looking for and don't forget you can run 3 rollers instead of 6 as long as the 3 you're using are evenly balanced around the variator, also sliders are probably a better option as opposed to rollers

 

You can also have 2 different weights in there as long as you have them spaced out evenly
Like clockwise 4gram,5gram,4,5,4,5gram