So, took the ERC class yesterday in Salt Lake with DHeaton and 6 others, don't know if they were members here or not. About halfway through class, 2-3 hours in, my wife started riding 2up with me for the rest of the class. After the first excercise I noticed my rear brake starting to stick. After a few minutes of "rest" on the bike, it seemed to be fine again prior to the next excercise. Again during the riding it would start to stick. Let me preface that 2 weeks prior to the class, I took it in to the Honda dealer and that did a complete check on the bike, replaced the master cylinder from a past recall, changed oil, plugs and all fluids. I called the service manager during a break in class, and he said to bring it in after class and they would check it out. Leaving the class, after about 6 hours of riding, I rode about 10 miles to the dealer, once I got on the freeway, the rear brake gradually got worse, by the time I got off the exit, my rear tire brake felt like it was dragging badly. 2500 rpm was the only way to start off from stop, letting off the throttle at speed, the bike would come to a stop. By the time I got to the service department, the rear was almost completely locked up, and smoking. Service tech came out said it was caliper, I was wondering in anyone else has ever expeirenced this? Could it have been anything that the dealer did when they changed master cylinder recall? From the time they fixed the recall and did the service on the bike, I had put on about 100 miles. I am just wondering if all the friction zone riding in class might have had an adverse effect on the new master cylinder? No body else in class had any trouble with their brakes. Outside of the mishap, the wife and I had a great time meeting Dheaton and the others, I have to say that there are quality people that ride Goldwings!! Thanks Dave for all your input yesterday in class, any tips and help coming from veteran riders helps us "new" riders immensely!! The wife, being a "new" passenger, was really comforted listening to Dave and the rest of the guys there about how "safe" it is to tour. Thanks.