I think Sheenes number was only retired in Britain. Never heard of it being retired on a world scene. Googlearch tells me Britain.
It's only since race numbers became a "trademark" rather than a representation of your previous season's finishing position that this has become an issue.
Bring back yellow/green/black plates.
would anyone really want to use it? I'm not superstitious but I wouldn't be super keen on riding with 58.
Indeed. I agree with Stoner's assertion too that the champion rider should have to run the #1 plate.
Laverty ran it in WSBK with success so I don't see the issue really. It's just a number at the end of the day.