DG Rider
Member: Triple Clutch Club
Lifetime Member
The are plenty of Japanese EFI cars that have valve adjustments as maintenance.This one was never abused driving by my wife mostly around the place for work. No EFI car produced requires valve adjustment as a standard maintenance that I know of. And if you research this problem on the Honda MUV700 it is a lot more common than you think.
@Farmer also had a lightly used machine with the issue. It goes all the way back to the Rincon. Again, it'd be nice to know why it happens. Honda has never said, and probably never will.