My son's 04 WR450 has had terrible front brakes forever and it's getting worse. They are spongy and do not grab the rotor. I have bled the front system countless times, from the caliper to a bench bleed, with not much change. The stock pads were the worst. I switched to Galfer "Black"/ semi metallic and it grabs better, but not like it should. These are the best pads for my KTM, but I'm not sure what the Yamaha likes. I noticed the stock rubber front brake hose would flex as the lever is squeezed, so I put on a stainless braided. The hose flex went away but the stopping power is not there. I put in a master cylinder kit, bled the system and it's no better. I've used brake cleaner on the pads and rotor, deglazed the pads, scuffed the rotor looking to get a clean bite again and nothing better. I'm about ready to take the front master cylinder off from my old '01 KTM and try it. Does anyone have any suggestions or better experience with these front brakes?