SX/SXi/SXi Pro Factory Limited Pipe

They have jetting instructions for the 2 jet dual keihin's with the flame arrestor. They recommend lowering my pop off. I have 3 jet 40mm keihin carbs so idk a starting point on the jets. Right now im 72 pilot, 45 mid, 135 main. Any idea where to start? Which jet should I fatten up?

2nd, the seller says a couple of the adjustment screws are stuck. I have a acetylene torch, should I be OK?
 
Not sure on the carb jetting

I used a butane torch on my adjuster screws on the head pipe and it worked like a charm. Might have to be a bit more careful with acetylene
 
I just read one guy with an x2, 750 motor, these carbs and 650sx pipe has a 75 pilot and 138 main. Can 3 measly numbers make any real difference? It's hard for me to measure jets in relation to turns out on the screws.
 
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