So many hours into this with practical work and lots of reading. Lightly used this bike for the last few years as I was riding the 2008 R1200RT.
Anyway, rear brake pedal went soft so been meaning to replace the rear master cylinder and needed to do that this week. But I have a 2nd R1100RT which needs a new battery and a rebuilt front shock and sons dont want to ride so this known good master cylinder with a hard pedal even after sitting for two years I put in the bike and I cannot get a hard pedal. I have used a big syringe to push fluid from the caliper all through the system and filled the reservoir that way. No joy. No pump from the plunger, zero activity. Its like it has no seals in it. Wont even pull from the reservoir. Is it possible the ABS unit is the culprit?
Anyway, rear brake pedal went soft so been meaning to replace the rear master cylinder and needed to do that this week. But I have a 2nd R1100RT which needs a new battery and a rebuilt front shock and sons dont want to ride so this known good master cylinder with a hard pedal even after sitting for two years I put in the bike and I cannot get a hard pedal. I have used a big syringe to push fluid from the caliper all through the system and filled the reservoir that way. No joy. No pump from the plunger, zero activity. Its like it has no seals in it. Wont even pull from the reservoir. Is it possible the ABS unit is the culprit?