The ones you do not maintain, if you always check bolts, nuts, oil levels, engine, fork, and case oils that is. And change oil every 1000-1500 miles most motorcycles will last you forever, its when you don't take care of things and maintain them you have problems
It's break down and metric bikes rarely break down.
Break down? All of the Japanese Big Four produce very reliable machines. Reliability simply isn't an issue that can be used to justify one brand over another.
