WOT bogg/sputter before powerband

[flatbedin]

I'm looking for some jetting help with my 01 banshee. Setup is stock stroke, aggressive dune port, rechambered stock head, v-force, stock carbs, pro flo K&N, trinty pipes, +6 timing, 140 lbs comp, 850ft in GA. I installed the ported cylinders back in the winter and did a plug chop with 320 mains and plugs looked perfect. I've been running stock pilots with the clip in the 2nd groove from the top with a small washer under it. Since it's gotten warmer here I've noticed a bogg/sputter at WOT before the powerband hits. For example, when riding dirt roads in 5th and 6th and after slowing down below the powerband, I can pin it wide open and it starts bulding speed. It actually pulls decent before the powerband, but just before it hits I can actually feel it loose power and slow some. Sometimes it will sputter a couple of times, then it hits pulls good and hard and cleanly. My thinking has been lean the mains some for warmer weather 60-70F vs 30-40F, so I installed 300 mains and it feels like it picked up some on the top end but the bog it still there. I've have the clip in every groove on the freakin needles and I know when I'm too far rich and lean at part throttle but the bog is still there. I tried some 27.5 pilots for the heck of it because I know all these carb circuits overlap some what, but its still boggin. I've installed new NGK plug boots, checked flywheel gap 0.018, closed spark plu gap to 0.025, and the bog is still there. I used to run 280 mains before the ported cylinders, but I'm afraid of going too lean with the portiing. Could 280s be safe with my setup? Is this bog from being too rich, too lean, ignition? Help please.

[robert.b.west]

I had a dune ported cylinders and about the same elevation and I think that my jetting was somewhere in the 350-370 on the mains and the 3rd position. Just based on my experience that seems kind of lean on the main and the needle.

 

I also had t-5's which i have heard are similar to the trinitys.