Has anyone pulled the plunger out of one of a Brembo rear brake master cylinder and seen what exactly is in there for seals... Are 2 smalls o-rings used on the piston or is it some OEM specific thing used? This pic shows what appears to be 2 small o-rings on the piston but I'd like to confirm these are really o-rings and can be found at many part stores before I tear into the cylinder...
my '06 250 wr had cupped seals - not o-rings Also, check where the chain slaps the brake fluid feed line into the master- mine had a wee leak there from wear- was not a faulty master after all
I see a little rubbing on the brake line also but mine is leaking from the cylinder ... Are those cupped seals available anywhere? Dealers wanted to sell me the piston also at ~$40.000 ... Not sure if the guards fit a WR250 ...
suggest the piston should be replaced also as it will show signs of wear if you have been getting the miles on
