After a couple of well-placed letters, Yamaha USA admitted to the existence of caliper rebuild kits (seals, not seals and piston) for the front calipers on an '82 XJ1100. John @ Zanotti Motors says he can get the kit, part # 4L0-W0047-01-00, for $24.56. You can contact him @ 724-283-5419, info@zanottimotor.com, orders@zanottimotor.com, or returns@zanottimotor.com. Good luck.
Pegasus54
Pegasus54