start a new thread for more input.
but.
airscrew setting? 1 1/2 turns out
main jet?# 240
pilot jet?# 35
stock carb? yes
post pics/of your carb you would be surprised what we will see wrong
premixed or oil injected? premix
spark plug? BR8ES
reeds are fully closing? not sure
compression reading?
just with the fmf pipe.
it should be around a 280main jet The 280 main was in it when I bought it. I thought that sounded a bit too large but I can put that back in it.
air box lid on or off? Off
pre mixed or oil injected? Premix
carb floats might be getting stuck or not adjuste properly.
comp test it