expecting

ok so i have a new 1/8 mile best of 6.67 @104, the bike has kerker 4 to 1, stage 7 jets and metzler 880 rear tire, otherwise its stock. also i weigh 155. i enjoy running the bike but dont care to dog it out, i've ran it about 20 times now. how much more could i expect? i dont know what its...