OMG...now you are causing me to relive old nightmares, lol. I do in fact have a fair bit of experience with them because I did every second of the testing on that model, and I can tell you that they are nearly indestructible and it never died or broke anything during any of the tests which were fairly extreme, like riding it up and down a freezing cold, 100 yard stretch of a 2 foot deep rock strewn river ever fkng day for 5 days straight in the middle of the winter, then riding it for days on end on a small motocross type track that had small jumps and big bumps etc, then towing around a 300 lb trailer for hours on end after I had to shovel it full of dirt and then un-shovel it after the test, then towing our big 8,000 lb box van in the R & D parking lot etc. I hated that fkng bike so bad that I really wanted to break it, but the muther flocker just kept on running so I had to keep on riding it.
As far as anything specific being problematic back in day, there wasn't anything whatsoever, however, years down the road I would be inspecting the gas tank for gunk, and the fuel pump might be the first thing that needs attention besides the usual fuel lines and brake shoes, and the brake shoe actuating arms and brake pedal pivots needing grease etc.