With your setup I would be cautious running anything less than a 280 main, and you may need
a bit bigger. Just looking at the color alone is not the safest way to judge if your jetting is correct.
It could be possible that another circuit is right on the money or a tad rich, thus giving your plugs
an overall good color. Its not to say that your main circuit is lean, but if it were on the lean side
it would suck to not get the full life out of your top end. There are many ways to verify jetting. Plug
chopping, WOT 1-6 plug check, if its lean it may not run 100% @ WOT in 5th or 6th, some guys do
it by how the bike feels/sounds/runs, etc... To get your feet wet blow 5 bucks and chop a set of
plugs. Quick and easy way to see where you stand. Good luck... Oh, and just go with some good
aftermarket reeds on the stock cages...