125-200cc Switching from BR9EG to BR8ES??

I have no idea how to check that, Im pretty handy except electrical issues

You would need a puller for the rotor, dw its unlikly thats the cause but it is possible.

I agree, 1 step hotter with the plug range shouldn't hurt anything, Iridium plugs are worth it, and the type of plug and heat range isn't causing the issue.
If you've been racing you need to check compression and ring gap. I like some bean oil too and was using Maxima 927, bike ran and smelled great, but too much spooge while woods riding. Just switched to Kotz Techniplate (my old fav) and spooge is reduced to just a dribble. Both @ 40:1.
There's a lot of confusion about rich/lean mixtures: more fuel=richer, so 40:1 is richer (and hotter) than 32:1.

I would start with basic Husky troubleshooting:
intake/reed block/carb boot air leaks;
also make sure you have a good seal on the Lectron, mine has to be pried a little forward before tightening the clamps;
crank seal? no water in oil;
strong spark? I still don't trust the late model digital setup;
check the plug cap and wire for damage and under the tank connections too.

Lectron carb is a really simple device, it should just work. If not, there's some other issue. I've seen a couple of folks blaming the Lectron without confirming good compression, fresh rings, no air leaks, etc.
I would put the Lectron back to stock settings, @ 51mm rod length, 1 turn out on the PJ, 1-1 1/2 out on the idle screw and see how the bike starts and runs and tune from there. Use fresh fuel, plug, filter, etc.

How did the bike run before the Lectron?

i like to buy the gallons!!

Yep, me too. Even makes weedeaters smell good.