Hi,
To anyone who is having trouble bleeding their trials rear brake. This just worked for me after spending a lot of time trying.
Remove reservoir cap and empty fluid with a syringe.
Then attach a pipe and syringe to the caliper bleed nipple and secure with a jubilee clip.
Remove syringe plunger and fill with dot 4, allow air trapped in tube to rise then put plunger in syringe.
Open bleed nipple and force fluid back to reservoir, emptying with a second syringe.
Once done couple times, leave reservoir filled and put cap back on.
Then open bleed nipple and pressurise caliper with the syringe and close nipple whilst keeping pressure on syringe. Keep syringe attached and with fluid in at all times, no air.
worked for me after rebuilding master cylinder and buyer a new caliper aswell.
Might be of help to someone.
