No lid
300R exhaust & then Pro Circuit 496 exhaust
250cc
125 main, stock pilot, 2.5 turns on screw, NT1C 2nd notch
Stock filter & screen
1000 ft normally but rode it up to 7000 ft.
Ran great no carb issues what so ever. Plug looked good, tore engine down & all looked good as well. I dont think this setup was too rich at all.

No lid
Pro Circuit 496
300cc
Stock filter & screen
132 DJ main, stock pilot, 2.5 turns on screw, DJ dual taper needle, 4th notch
1000ft normally, have not taken up to elevation yet like this
Also runs great--a little better throttle response before (& more power due to the 300 jug). Plug looks good.