2025 Apollo rfx 250 thunder nibbi carb jet size ?

[Dirtrace25@aol.com]

Hi, new to the Chinese market have owned a bike dealership in the past. I recently purchased 2 Apollo RFX 250 thunders. From factory carbs are junk . Already replaced with nibbi 28mm carb (what was recomended) huge difference in power and performance. But still has a bad bog when going from idle to wide open throttle. The reason for joining here is to try and find out what size jets you guys have found to work the best.

[Dirtrace25@aol.com]

Any advice would be appreciated