I upgraded the brakes on my tracker with one of the 35mm kits from Pandemonium Choppers. Got a 4 piston, 65mm bolt space, Bembro caliper and MC. Already had stainless braided lines and drilled rotor. This is, IMHO, the best upgrade for an XS. The difference is amazing. I live in the mountains of NE Georgia where the only straight road is my driveway. My route is 45 min of nothing but twisties where the new brakes put a big grin on my face. Two fingers and very progressive, almost as good as my VFR. If you need lines made, try yoyodyne.com. The AMA pro I pit for recommended these guys. I gave Fred the length, banjo bend and VISA #. Had the line on the bike 5 days later.