This is the world we live in my friend.
I had a 1977 Kawasaki KZ1000. If you read the owners manual and had just a bit of mechanical aptitude you could sync and re-jet the carbs, , do a major/minor tune-up, and adjust the valves.
Modern motorcycle owners manuals tell you not to drink the contents of the battery. To be sure, modern motorcycles are much more complex than an almost 50 year-old Kawasaki. Back in the day, noticing a bit of valve float, I went to the local dealer to get new, stiffer valve springs. I'd bought 2 motorcycles from him in the past and he said "bring it in Saturday morning. I'll leave the door open for you. you can use the bay and tools. No one will be here." I thanked him, and did the repairs in the comfort of his shop, not my yard :hihi:
Times have changed