u/FroyoInfamous

I have a 2021 z125 pro I just got on trade. The fuel pump was out so changed it with an allballs one. Also noticed it didn’t have an intake filter so put an amazing 50mm cone on it. After that it now has cel 14 and bogs down in 3rd gear or higher at 40mph. Can’t really go any faster and if i give it more throttle it just bogs more. Owner said it has sat for a year or so. Any ideas on what’s causing it. I have tested the engine temp sensor and the ohms were good when cold. I taped off half the cone filter and it still bogged down around the same speed. I’m at a loss at this point. Also did notice it has an aftermarket exhaust as well