I've owned 2 YZ400's and 2 WR's. I've been able to remove the front rotor on two of the 4 bikes. On the other two I striped the allen head bolts and could not remove the rotor because of it. Does anyone have a suggestion on how to safely remove these without stripping them? Also, can you tell me how to remove them after they are stripped? Please don't tell me to use an easy-out. They always break on my and then I'm more screwed than when I started.