I like to increase the sprocket size in the back, esp on the small bikes like yours. The front sprocket is very small as is, and everytime you take a tooth off you reduce the circumference of the circle, making it harder and harder for a 530 to make that turn, esp on a chain that hasnt been oiled. Smaller fronts wear chains faster and more often break than stockers because of the turn radius. I keep a 17 on the front of the busa, but have used 16 and seen it chop up the chain slider on my arm.....your prob starting with a 15 or something up front right??