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View Full Version : What Mastercylinder bore size for a J6 single rear caliper.



bugman53
04-07-2015, 10:15 PM
I have a Bourget Kruzer FXR that has a single 6 piston Jay brake rear caliper and an 11.5in rotor. The rear brake is weak and the pedal feels rock hard. It takes way more pressure then it should. I have flushed and bleed the lines. I am running EBC HH pads with a EBC stainless floating rotor. I got to investigating why and it looks like it has a 3/4in bore rear master cylinder. It seems like the master Cylinder is just to big for a single rotor. I'm guessing that i need to go with a 5/8 bore MC?

So my question is what is the recommended rear master cylinder bore size for a single J6 caliper?

schultz
04-08-2015, 07:48 AM
Your assessment sounds correct and the 5/8" should work well with the single 6-piston caliper.

jojohan
05-10-2017, 06:47 AM
Thank you schultz!