well ive determined that the bike was running rich, in 6th the bike was bogging out at max throttle. my plugs were marshmallow brown.. the plugs looked pretty good so i looked at the jetting faq and i determined that i was rich. i was at 310mains, no lid, 3.5 turns on the screw, stock pilots, and stock needle position. so i moved the needle up one notch towards the blunt end and took it around the block ...i couldnt find a bog. when i first started it was smoking like hell which made me think that i went the wrong way on the needle but after i took it around the block it feels nice. what should i do to make sure im not running too lean??