I’ve bled my rear brake , but still can’t get any pressure. Also one of the pistons in the calliper will not come back out but I am assuming that is caused by the lack of pressure. 

Any help would be much appreciated. 

Cheers , Calum

Edit - not actually sure all the below applies to the Evo but I'm sure they're almost as painful as the rev 3. 

 

You've just found the hidden gem of owning a beta. The impossible to bleed rear brake! 

Have a good search through the forum but depending on age, it's possibly worth getting new seals for both the MC and caliper and maybe new pistons for the caliper too. Strip down, clean all the recesses where the seals go and rebuild. Bleed it off the bike using old pads and something solid to put between them. Often best to use a screwdriver or something to pump the MC piston even on the bike. 

Assuming of course you've tried all the normal steps like back bleeding etc. 

The rear brake can be a nightmare. It takes a lot of time, patience, and effort and even then you can be left with rubbish brakes. 

Persevere but expect it to be a pain and then you're at least in the right frame of mind. Good luck!

Edited February 15, 20197 yr by al_orange

 So why did you bleed the brake in the first place? Nothing that hard bleeding brakes. (Just most people are not very patient) The stuck piston is an issue though. Most rear brake problems are really just worn out pads.