Hey guys, I just bought a zongshen zs250gs, awesome bike with streetfighter look BUT I have this scorpion aftermarket exhaust that I want to install, the only problem is I know I have to rejet the carb. I have no clue what size is the main jet and pilot jet, should I change both ? only the Main Jet ? Only the Pilot Jet ? And to what size should I change them ? thanks for helping me out.

Cyril GHISLAIN