i have a 2000 Royal Star Venture, and it was in the shop to get the rear air shock replaced 'which i found a great low mileage one for 150.00, and a new rear rotor put on..first issue i notice when riding home was it felt there was a drag...so i pulled over and rear rotor was SUPER HOT to the touch....pistons looked extended and not floating back , so i let it cool down and proceeded a short distance home and returned bike back to the shop...he suggested there was crud in master cylinder...so i got lucky and dealer has a rebuild kit in stock, so i ran and got it and the shop my bike was in rebuilt and pneumatical bled the rear system....he said the was gunk in the Cylinder and seems ok....i rode it home and for a little bit it seemed ok...so i took it for a ride and whammy caliper was sticking / causing heat and drag again....so should i be safe to bet, after i looked under dust cover and discovered the slide pins and contact pints for pads were dry / no lube!! and the pistons look a bit dirty....shall i emery cloth the pistons when i extend them and give caliper bad area a good brake cleaning , lightly sand pad contact areas as well and apply a little lube to contact pints and slide pins???? is that safe to say??? i leave for surges on saturday....and rather not have this issue on the road.....btw....the dealer doesn't stock the caliper service kit.....so this i feel is the choice to do to see if that does the trick.......and help on this would be appreciate ...thanks in advance....