Rear tire wears down fast of my street glide 2007, I don get more of 2500 miles of the tire i use the Dunlop Harley Davidson MU90 or MU85 and i put 36 psi on them, we ride two up and luggage total weight 390 pounds, Any Ideas????

SOURCE: need to replace rear brakes on 2008 street glide

it's pretty straight forward. remove saddle bag, remove the 2 allen bolts that hold the caliper to bracket slide caliper up off of disc. then remove the small 3/16 allen bolt this is the pad pin that hold the pad. before you remove the pads turn caliper upside down and with a large screwdriver put it betweenthe old pads and trist it to push the piston back in the caliper this will give you room for the new pads. then just lift the old pads out and put in the new and reinstall the pad pin and caliper back on bracket install the 2 bolts removed first and tighten good. if you need any more help just ask.

SOURCE: 2007 harley davidson flhx street

I don't work on the Twin Cam engines but if it'surging, I'd suspect a lean fuel air mixture is causing the problem whether it's carbureted or fuel injected.

Good Luck
Steve