most peoples ears are trained to hear what their engine sounds like when it's running bad vs. good vs. great.
it's the ease of set-up...i'm not going to run wide open in the rain or past dark just to see if my jets are close...also anyone could realise people should run your carb out of gas when your done riding...
more people but their motors away thinking they will get right back to it...
that's the guy who says ; it was running when i parked it 4 years ago.