ok, on my kfx i have a 3.5" lowering kit front and back with stock shocks. soon to be 1.5" wheel spacers in front and back. at the moment im running itp holeshots front and back.. 20" back and 23" front ( huge right?).. ive never raced the bike except for on a lil homade track in a buddies back yard an it does great, i juss think theyres alot of room for improvement in the rubber dept.. what is everybody running? what works best? sizes?