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Discussion Starter #1 (Edited)
Hi guys,

I tend to get air in the system every 300 hundreds miles to a point where finding the neutral is nearly impossible and the rear wheel locks on aggressive downshifting.

I have an EVR cluctch slave on my 2008 Hypermotard 1100S. The clutch itself and the master cylinder are stock. I have a Speedymoto pressure plate.

I haven't noticed any reduction in terms of clutch fluid. Just air getting into the system somehow.

Is this a common problem with the EVR 30 mm clutch slave?

Thanks,

francesco
 

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Hi guys,

I tend to get a lot of hair in the system every 300 hundreds miles

Thanks,

francesco
there's your problem , here in America we use brake fluid in the system not hair.
maybe trying a different color hair or maybe curly hair might work better.

boy that was funny to me!!!!:D

:eek: now for real. you need to bleed it with a vacuum bleeder and wrap both bleeder screws with Teflon tape so no air gets into the system.

if your in so-cal i can show you how.
 

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Old Wizard
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A larger-than-stock slave cylinder is often used reduce the hand force needed to pull the clutch lever, but it will ALWAYS result in less clutch plate separation, causing drag, and problems finding neutral when the plate separation is incomplete. The stock slave gives you shorter pulls, and therefore faster shifts.
 

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Discussion Starter #4
there's your problem , here in America we use brake fluid in the system not hair.
maybe trying a different color hair or maybe curly hair might work better.

boy that was funny to me!!!!:D

:eek: now for real. you need to bleed it with a vacuum bleeder and wrap both bleeder screws with Teflon tape so no air gets into the system.

if your in so-cal i can show you how.
Thanks for spotting the typo El Tardo. I'm glad you can get so easily amused ;-)

Regarding your recommendation, that doesn't address the issue. I perfectly know how to bleed a system correctly. And I can assure you that the job was perfectly done.

The point is that air gets somehow into the system after. I wonder if this is a problem caused by the EVR 30 mm clutch slave and I wanted to ask other guys who have the EVR if they have experienced the same issue.


Francesco
 

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if what you say is true then your slave has a bad seal or its the master. if all was done right air cant get in on its own.

not saying you dont know how to do it but my opinion is theres still air stuck in the system.
remember this- if air can get in fluid can get out.simple science.


Thanks for spotting the typo El Tardo. I'm glad you can get so easily amused ;-)

Regarding your recommendation, that doesn't address the issue. I perfectly know how to bleed a system correctly. And I can assure you that the job was perfectly done.

The point is that air gets somehow into the system after. I wonder if this is a problem caused by the EVR 30 mm clutch slave and I wanted to ask other guys who have the EVR if they have experienced the same issue.


Francesco
 

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Im getting the same action from my 30mm EVR clutch slave.. Flushed out air bubbles (took forever) clutch doesnt seem to have as much pressure as it did before after a test ride by the time i got home clutch wasnt working right was super tight to shift gears wondering if my clutch slave is bad maybe ? Im waiting for new clutch pack and basket but think this problem is something else..did u ever find a fix ?
 

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Hi I am also having the same problem, I have the Ducati Ergal billet clutch slave cylinder, Ducati anodized vented clutch pressure plate. S/S springs on my 2012 1100 Evo. After about 800 km's it seems to go spongy and hard to change gears I have now bled this a few times . I put a dial indicator on the pressure plate and measured it before bleeding and it was 1.2mm travel and after bleeding it came up to 1.6mm travel and not spongy any more. I am also confused at how air can be getting in as my bike has only done 7800 km. I was thinking it might be a dodgy master cylinder. :confused:
 

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What difference would a wet clutch make over a dry clutch if the actuation system is a hydraulic master cylinder and a hydraulic slave cylinder? :( :confused:
 

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So I re-bleed master a bounce of times like 10 are so this was after re-bleeding slave to make sure no air was in line which there wasnt and got pressure back to what feels normal and gives a nice push action..
Going for test ride in a little bit.. I think i had a small air bubble in Master area and it took awhile to get into system was on highway so wasnt much clutch action going on but this test ride will tell.. Im hoping it has nothing to do with my slave..
 

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I bleed my system from the slave cylinder upwards to the master cylinder using a large syringe filled with brake fluid. I found bubbles come out from the master cylinder straight away when I push the fluid upwards making me think its the master cylinder. After that the clutch lever feels tight and not spongy. :think:
 

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Hi Wes I test ride it and it feels good and works great but after a good hard ride and about 800 K's it goes to shit again
 

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Try as I might with vac system to bleed clutch I was at a loss why I couldn't get pressure in the system. The vac pulled air only and no fluid down the line.
I read another post here how the threads in the bleeder bolt could pass air and pulled the nipple out, leaving the Bango in place and the system gravity bled itself.
I laughed out loud because it made sense but wouldn't have thought of it.
Stubborn pays off when you keep at it.
 

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Last ditch issue, all other bits in the system having been checked - Check your torques on all the banjo bolts at the slave and MC hose connections. if they aren't torqued to spec and deflect to conform to the mating surfaces, air can get pulled in. And I'm hoping you used fresh crush washers when last assembled..
 
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