They may start small, but as Fred said, you can catch them before they get large enough to be a real safety hazard. Ask "Jazzy Jeff" about the crack he was able so see in his weld (before they replaced his bike for him).Deadeye-USMV said:....these cracks are mighty small and I doubt you would find one with all the parts in place and the bike upright, so why bother looking.
I'm ashamed of my post because it was not clear enough. I would suggest inspecting if the bike is outside the VIN range, as you see in the quote above. :banghead:Like Jon said, except if it is outside the range, I would not bother with the periodic check.