I spent lots of time on the KLR forums and upgraded every weak link that was ever mentioned. First oil change was Rotella dino at 500 miles, at 1500 miles I switched to Rotella synthetic and changed it every 2k-3k miles after, usually the shorter end of that except if I was in the middle of a trip.
A couple other things I had done are progressive fork springs, heavy rear shock spring, upgraded headlight wiring and switch to 100w bulb, and a long list of other things. Mefo tires were bought a week before my trip. Those ammo can panniers have a bracket system i built so they are removable by pulling a couple pins. They can be locked in place as well.
Problems I had, but are not limited to: Exhaust fell off 2 months after buying the bike new, dealer wouldn't do anything and claimed abuse. 3 months later I got a recall for exhaust fastener issues. Steering stem nut was constantly loosening, until I finally peened a spot so it wouldn't vibrate loose.
I do miss riding it very much. It was very comfortable, even for long distance riding. Mileage was pretty good, and it handled our rough northern roads very well.
Jim
