Just picked up a 2010 YZ450 with 70 hrs on it. It is in good shap excpt for front brake.
It have an 08 master cylinder on it. Was trying to diagnose issue but no luck. The front barke will grab partially but as you hold it, it releases.
I tried to bleed the brakes but still no luck. I then took apart the master cylinder, cleaned it up. All seals and spring seem to be ok.
Still behaving the same way.
Any suggestions as to what to try next?