SUCCESS! I was talking to my buddy who runs sleds and he brought up since I was messing with the spark arrestor to see if the packing dislodged. Sure enough, clogged core. She's running great again... until I break something else hahaha.
Thanks for everything! I love the community on here and how helpful everyone is.
It would concern me more if it had dropped in one day and was different from the left cylinder. I am planning a rebuild later this year to take of the lower compression.
I'm getting spark, and plug has been wet so id assume I'm getting fuel. I ran it for a bit and was getting a wet exhaust. I pulled my expansion pipe and there was no build up of fuel in there
I was able to see through it, but at this point I'll try again, since it'll be off when I swap carbs. I may end up getting new jets, that are slightly larger. Since I'm running 290 mains