Bones, you said you had a 4 inch extention and a slick, on your 1100. I've seen bikes with six and eight inch ones on DOT tires . How much is too much with DOT's. I just got mine, it's a '89 GSXR-750 with 4.5 inch extention and lowered 3 inches all the way around. Still trying to find the best set up.