Love those old Thumpers. Have had a bunch of them with no real problems yet. Got my fist TT back around the mid 80s and have been hooked ever since. Almost always have several in the stable. Great bikes but they dont compare to the newer dual sports but are still quite capeable bikes when ridden within their limits.
Currently building a street legal flat track style bike using bits of a TT500 XT500 and SR500. Here is a pic of my XT and the project bike.
Congrats, nice ones are harder to find every year. Lets see a pic of yours.