Hey we need to know what your elevation is before we can help.
Also here are my mods
Toomey t-5
K&N
LId no snorkel
+4 timing
626 feet above sea level
NEed ot know all that. THen we can help you.
I run 270 mains with a 25 pilot.
ALso if u r having bogging problems, i would start wiht the 280's, Its not all about the main jets,
U have to mess wiht the airscrews and needle clip.
Heres mine
270 mains
25 pilot
air screw - 2 turns out
needle, - dont remember what clip.