Here's my '86. Not much to look at. Engine was rebuilt about five years ago, but I've only put about 3k miles on since then. I had the infamous bad CDI cut-out problem, and couldn't figure it out. I read about it somewhere, replaced the CDI, and its ran beautifully ever since. Only engine mod is a 10.5:1 piston.
Here is my most recent upgrade. The disk is an EBC from Motostrano
. The disk bolts right on, but you'll need a '93 and up caliper and the pins that the caliper slides on. I got one from an XR650L.