Main Jet Upgrade did not work at all

[Mäwby]

I tried rejetting two carbs I have. When trying different jets, all led to the scooter bogging down under full throttle. The only jet I have that works properly is not marked so I don't know what size it is. I have a 24mm and 26mm carb. The unmarked jet works best in the 26mm carb. Any ideas of why the other jets led to the bogging down in both carbs?