They aren't hard bikes to work on, it just takes a bit more time since you have to remove the gas tanks for almost any sort of maintenance. I check my valves every 10k miles, but the 990's have a 15 or 20k interval.
"Everyone you meet is fighting a battle you know nothing about. Be kind, always."
"Listen to my soothsaying giblets!"
KTM 525 XC-W // KTM 950 Adventure