I think I am popping around 70/80 psi though it seems its on the higher end, nearing like 82-84 psi. I can hear a very small air leak before it pops. I need to find out where it is coming from and seal it to get a more accurate reading and a good 3x average. I had to use some pretty stiff fuel line from Autozone so that may be part of the issue. Where do I need to be with the overbore to 81mm and running the 1.2 needle valve with the 150 and 90 jets?Nothing should change the 1.2 will work just need to use correct spring for needle/seat you want to be about 70/80 psi for pop off. I have the chart home.