Oldnewguy wrote on 09/04/09 at 13:05:21:And remember, the bike couldn't care less,
If this is true, then why have a high mark? We should add oil untill the site glass is full?
Don't take that so literally and to the extreme.
The bike will operate best when filled to the correct level. Overfilled a little shouldn't be an issue unless there's some event that would cause the worst case senario. Like all the vents are blocked or oil being foamed be the crank or... or... or... I don't think that up to 1/2 a qt. can be added to a stock bike running on flat ground, minimum bumps, well coordinated turns, minimum grin and no panic stops would have an issue. That's a big qualification, but I know they take into account the extreme events which cause issues. So if you don't have those issues, overfilling isn't a problem.