Clutch master cylinder problem

Toys1 · Apr 20, 2018

I changed out the levers a few months ago and now I just changed out the clutch slave cylinder with a Ducabike one. But, now, I can't bleed the system. Somehow when I pull the clutch lever in, it won't push into the master cylinder diaphragm (or whatever you call it). Tried adjusting the small screw on the lever to get it go further into the master cylinder but still nothing work. Removed the lever and use a small metal rod pushing into the master cylinder and it works normal. Been trying to adjust the screw in and out but can't get the lever to engage the master. Please give me any advice or suggestion. Thx.

Halo2 · Apr 21, 2018

You have to bleed the master first then slave

Toys1 · Apr 21, 2018

Halo2 said:
You have to bleed the master first then slave

I tried bleeding the master also but couldn't bleed it because the lever won't push into the madter cylinder diaphragm.

Toys1 · Apr 21, 2018

Would the master cylinder get clogged or anything of that sort? I took the banjo bolt out from the bottom of the master cylinder and no fluid came out of it. Even tried to pump the lever a few times but nothing came out, even air. But if I take the lever out and push a rod in, I’ll get normal action and fluid came out. This is bugging me and got me wondering and guessing all possibilities last night. Please help. Any suggestions would be greatly appreciated.

Macattack · Apr 21, 2018

"DUCABIKE BILLET/CF CLUTCH SLAVE CYLINDER: DUCATI [ALL EXCEPT PANIGALE/DESMOSEDICI] 30MM"

Are you sure you've got the right slave cylinder?

the problem- if you use deductive reasoning -is not in your clutch lever
because the problem started when you replaced the slave cylinder I'd focus on this . the lever was working fine before .

Toys1 · Apr 21, 2018

Macattack said:
"DUCABIKE BILLET/CF CLUTCH SLAVE CYLINDER: DUCATI [ALL EXCEPT PANIGALE/DESMOSEDICI] 30MM"

Are you sure you've got the right slave cylinder?

the problem- if you use deductive reasoning -is not in your clutch lever
because the problem started when you replaced the slave cylinder I'd focus on this . the lever was working fine before .

Thanks for the suggestion but, I thought about that also. But, regardless of the clutch slave cylinder working or not, I should be able to bleed the master cylinder. Even remove the banjo bolt under the master cylinder and nothing come out with the clutch lever held in. That's what got me troubled all night long. Couldn't figure out why.

By the way, I bought the Ducabike AF04 30mm slave cylinder. It clearly stated that it's for the Panigale.
AF04 - PANIGALE CLUTCH SLAVE CYLINDER - Ducabike

slapshotb · Jan 29, 2021

Did you ever fix this? Just installed mine and had to use a hand pump I got from autozone before finally it would build enough pressure to disengage the clutch. Still feels like a tiny bit of air in there. When I try to do it in the clutch master I swear I can hear the hissing of air. And makes the lever go soft.

Don14R · Jan 29, 2021

Put tape on bleeder threads

Fill system with fluid after getting as much air out as ya can

Pull the lever in

Wrap a rubber band around it so the band is holding the lever against the bar

Go to bed

Clutch master cylinder problem

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