01 400ex no idle

Hello everyone im new to this forum. I have an 01 400ex i got off a guy and he had put a fmf megamax slip-on and a k&n filter on it but had left the jetting stock so im trying to jet it. He had it idling with the idle speed screw all the way in so im pretty sure that means he had it idling off the main. I pulled the carb apart and cleaned every bit of the pilot cercuit and i mean everything. I put in a 42 pilot and put in a 160 main. and i have the mix screw at 2 1/2 turns out. And i took the airbox lid off and put on an outerwares and took the end off the megamax. I replaced the spark plug the guy had only two threads in(still dont quite understand how i test rode it that way? LOL) but anyway does my jetting look close? And if i put the carb back on and it still will only idle off the main where do i go next? Thanks