I picked up my '06 WR450F back in '10. The front brake has always been very soft (not very good stopping power). The lever is very mushy and not firm at all. I've replaced the brake line with a braided one, new pads, and obviously bled the fluid as well as I could. I've also tried taking the master cylinder off the bar and holding it up high trying to make sure I didn't have any air in the lines. Even tried a reverse bleed. When I picked up a '03 CR250R in 2011, it has power brakes compared to the WR. Even with a blown fork seal and saturated pads, the CR's brakes are much better.
Any suggestions? I have a master cylinder off a '98 CR250R that I am thinking about trying. I also have the brake caliper but I haven't really looked at it that close because I didn't think it would bolt up.