well ive thrown a chain a few times, once cause my carrier was bad on my old 300ex i rode it home like that, go 300 yards, it would fall off, go another 300 yards it would fall off, it was a long day getting back to the truck, it smashed the case saver like it wasent even there and still cracked my case, threw a new carrier in and JB welded the case and it was good as new :biggrin:
BUT then i ran a entire GNCC race with a bad carrier on my old raptor and it never fell off once or broke, i didnt even realize it until I got there aND i Said fuck, i'm here, gonna go as far as I can, and I finished and ahead of my buddies 250r by the time the race was over, it was so bad i had to get a new swingarm it just worn the piss out of it and i had about 4 inches of play on it,
other times i just de railed a chain due to some bullshit sticks or something, but a case saver in my opinon is always a good idea