Rear Brake Fade - MC rebuild?

[STAg93]

Greetings,

Occasionally, even when starting out (cold), the rear brake pedal goes "to the floor". Fluid has been replaced, system bled, new pads. Still happens from time to time. I haven't found much info about servicing/rebuilding the rear master cylinder and it doesn't seem Honda makes a kit. It also seems that accessing the rear MC means removing right side exhaust, foot peg bracket, etc. I guess not much compared to an alternator upgrade but a lot to get to a MC.

Anyone dealt with this before?

PS: Bike is a 93 ABSI; non-linked system. Modulators were rebuilt by Norm K around 15 yrs ago but quit working a few years after that. Tape over the ABS dash light has been effective since.

 

[Uncle Phil]

Tape over the ABS dash light has been effective since.

If the ABSI is like the ABSII, there are a couple of connectors on top of the speedo/tach unit that can be disconnected and 'solve' the light problem.
The bulbs are 'internal' so you can't remove them (at least on the ABSII).
Yeah, sounds like your rear master cylinder could be leaking internally and letting fluid bypass.

 

[GreenZR]

Rear master cylinder rebuild kit from Ron Ayers Honda is part number
43520-MJ6-315
Gary.

 

[STAg93]

Thanks for the info. Much appreciated!