So I've been having front brake problems (06 yz450f). There is a lot of lever play before the brake starts to engage. My brother has an 05 yz250 and his front brake feels awesome and engages right away, no play in the lever at all. There is about 1/2 to 3/4 inch of play in the lever before it starts to engage. I have completely flushed the fluid and that didn't work. Then I rebuilt the front master cylinder, any idea what it could be?