Jetting for t5 172

Need some help getting set-up correct, engine is 172 mallossi,pm pipe 26mm carb,cosa clutch,at the moment got in 160 top be3 mixer and 125 main mixture screw 1 and half turns out.Runs and ticks over but dies as you open throttle thens picks up[?[]

Get a P2 idle jet 55/100, cut the top of it down so you can fit the air filter back on. i am using a be4 and 125 main with a scorpion, still playing around, may go to a 122 main