Sorry to start off here with a negative thread but I am having a complete mare with the rear brake on my 4RT.
It's been a little problematic but no big issues until 2nd last time out when I did a big jump which split the res to MC pipe,fixed that and but it then refused to bleed even though we tried new MC parts.
I replaced the MC with new and it bled easily enough,took it out again and the brake started binding as I guess in my desperation to get a brake I over adjusted it.Backed it off and pushed the pads back and no brake pressure no matter what we did.
I have bled the normal way,reverse bled,used a vacum bleeder and some of the finest trials brains have given advice it just won't bleed.
I have a new MC,tried a new hydraulic pipe and the caliper is 100 per cent not leaking.Every individual part works fine but I have no brake pressure at all.
This is the most frustrating thing I've ever come across in 40 years of bike ownership and I used to race 2 stokes!
Any help much appreciated as I'm at the point of breaking it for parts.