03-26-2020, 01:35 PM
Nice realistic story Guth and no doubt repeated many times over by owners of these mature bikes, initially i had no idea the tiny hole existed in my old honda so i understand why it's hard to find.
Dave, as far as i can tell it seems easyer to at least unbolt the m.c. since the tiny hole ( there are two holes just like in the front master cylinder) is under the part honda calls a "connector" which is the plastic elbow that is bolted to the m.c. and connects to the reservoir.
Since this part has to be removed all the fluid has to be drained from that supply hose.
Once the connector is unbolted the small hole should be in that cavity together with the bigger hole i talked about previously.
The banjo bolt may be left as it is and no additional bleeding required depending how good you are.
All these master cylinders appear to be the same over the years.
Here is a link to a clip that shows how the rear brake caliper is supposed to operate;
https://www.youtube.com/watch?v=nFcrdAEVAQY
And one on how to disassemble what's inside although you may not have to do that but just to show what the m.c. looks like in there;
https://www.youtube.com/watch?v=3LUL55mJzOw
If a copper wire is not strong enough you may be able to sharpen a single bristle from a steel wire bush or a small needle to do the job, just be careful to not produce a burr on the inside of the cylinder that could damage the rubber seal when it wipes past it.
Dave, as far as i can tell it seems easyer to at least unbolt the m.c. since the tiny hole ( there are two holes just like in the front master cylinder) is under the part honda calls a "connector" which is the plastic elbow that is bolted to the m.c. and connects to the reservoir.
Since this part has to be removed all the fluid has to be drained from that supply hose.
Once the connector is unbolted the small hole should be in that cavity together with the bigger hole i talked about previously.
The banjo bolt may be left as it is and no additional bleeding required depending how good you are.
All these master cylinders appear to be the same over the years.
Here is a link to a clip that shows how the rear brake caliper is supposed to operate;
https://www.youtube.com/watch?v=nFcrdAEVAQY
And one on how to disassemble what's inside although you may not have to do that but just to show what the m.c. looks like in there;
https://www.youtube.com/watch?v=3LUL55mJzOw
If a copper wire is not strong enough you may be able to sharpen a single bristle from a steel wire bush or a small needle to do the job, just be careful to not produce a burr on the inside of the cylinder that could damage the rubber seal when it wipes past it.