Yet another clutch master bleeding query

[SpikeC]

 My Bimota has an axial clutch master with an air bubble in it that is defying expulsion. Does anyone know if it is possible to add a bleeder to one of these? It is a gold one with remote reservoir, from 2007 or so.
Thanks for any thoughts!

[ducpainter]

What we always did on say a Monster without a bleeder was to pump the lever up....hold it in...and just crack the banjo bolt for a split second. It helps if someone can hold a rag under it to catch the fluid.

[Howie]

Also make sure your master is as close to horizontal as possible.

[SpikeC]

Thanks, I did the pump and crack a couple of times, and I had the master off of the bar so that I could try different angles. I saw a few bubbles that way but still the lever will go to the bar when slowly pulled. I will go through it again, though. The controls have 12500 miles on them over 8 years, for what that's worth.

[ducpainter]

Are these remote reservoirs or coffins?

[SpikeC]

Gold line with remote

[S21FOLGORE]

I think you can use banjo bolt with bleeder nipple.

https://spieglerusa.com/brakes/brake-lines-accessories-tools/brake-line-accessories/accessory-type/bleeder-banjo-bolts.html

You can buy directly from Spiegler, you can buy it from Revzilla or STG, eBay, Jegs, etc.

[ducpainter]

The bajo bleeder is an option also.

[SpikeC]

I like the banjo bleeder, that will be next! Thanks!!

[EEL]

if it has the slave, pull the slave off and push the piston all the way in. That will push the bubble out at the reservior.

AKA  "reverse bleed".

[SpikeC]

Thanks EEL, I'll try that.
One other thing, what are the symptoms of a bad master Cylinder?
The reason I ask is that when I pump the lever quickly is feels normal but when I pull the lever slowly there is no resistance.

[Howie]

Find a bolt the same size (not length)  as the banjo bolt and a crush washer.  Bench bleed.  Does it hold pressure?  More likely though, if there is leakage it is the slave.  Remove it from the side cover and inspect.

[EEL]

Thanks EEL, I'll try that.
One other thing, what are the symptoms of a bad master Cylinder?
The reason I ask is that when I pump the lever quickly is feels normal but when I pull the lever slowly there is no resistance.

I've had a bad master cylinder on my clutch lever in the past. First sign for me was leakage of fluid thru the rubber seal where the piston plunger on the clutch lever goes into master cylinder to actuate it. I saw brake fluid fly backward on my tank while I was riding.

Bubbles can compress differently when squeezed slowly vs quickly. Try a reverse bleed. The other option is to get a fancy banjo bolt. See link below from Spigler. This can allow you to bleed at any location. Not cheap though.

https://www.sportbiketrackgear.com/spiegler-banjo-bleeder-bolt/

[EEL]

Oh crap that link was already posted! my bad!

[SpikeC]

Thanks, I now have the banjo bleeder. The EVR slave is definitely not leaking. I am not finding any fluid anywhere, which makes it so frustrating!
I pushed the slave piston all the way in, no joy.