I don't do my own work, other than check air pressure, oil level, chain adjustment.
my worse experience, not on my scooter, on my V-Strom 1000, after my 2nd winter season, I caught the dreaded green cancer of the wire harness among other issues, my dealer even had a Suzuki NA tech fly in to take look at it. Everything was way beyond any warranty, but they helped with parts, and my dealer wrote off a few hours, it was still a $3k pill to take, which luckily I had something going on with the owner at the time and was able to barter, come to think of it, I was able to get my V-Strom repairs, my Kymco UXV450i (new utv) and 2 used ATVs out of that deal