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Old Jan 28th 2013, 03:59 PM   #1
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Clutch - air in the system

Hi All,
I've done 5000km / 3500mi on my 1199 S
I'm finding that the clutch is starting to engage further to the bar the more I use it. Not drastically but I've had to bleed air out of the nipple near the slave cylinder twice now. I've wound the clutch lever out fully using the knob near the pivot point.

Before I take it into Ducati, any thoughts on what I could try?
I am thinking it might be a pinched o-ring on the slave cylinder or something.

Thanks alot!
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Old Jan 28th 2013, 05:21 PM   #2
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Originally Posted by bishopau View Post
Hi All,
I've done 5000km / 3500mi on my 1199 S
I'm finding that the clutch is starting to engage further to the bar the more I use it. Not drastically but I've had to bleed air out of the nipple near the slave cylinder twice now. I've wound the clutch lever out fully using the knob near the pivot point.

Before I take it into Ducati, any thoughts on what I could try?
I am thinking it might be a pinched o-ring on the slave cylinder or something.

Thanks alot!
You're going to learn to love bleeding the clutch......this issue has been alive for over 10yrs+......

Many have tried all sorts of possible solutions.....slave cylinder spacers(to allow air to provide cooling of the unit, the thinking was the spinning rod inside the cylinder was heating the clutch fluid), slave cylinder upgrades (full replacement with aftermarket units), re-routing of the clutch line (the thinking was, since the line was resting on the engine the engine heat was boiling the fluid).....then there was the pin hole in the clutch lever boot, with out a pin hole(so it was thought) air was getting forced into the system as the lever was actuated.....

There may be other theories but I covered most of them - none proved to work, at least none worked for me......I've had ducs since 1995, and I've had this issue on all of my ducs except the original 1995 916......including a desmosedici

Get yourself a dedicated 11mm open end that you carry with the bike(wrapped in a small shop towel to cover the bleed nipple), for those times you forget to bleed it prior to leaving on your ride.....you'll be happy you have it with you...or get religious with bleeding it when you top off engine oil.......

In the end, save yourself any money in trying "fixes" unless its a proven solution.....in which case I'd appreciate knowing what you found
Thanks from bishopau
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Old Jan 28th 2013, 05:37 PM   #3
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Originally Posted by RD16RR View Post
You're going to learn to love bleeding the clutch......this issue has been alive for over 10yrs+......

Many have tried all sorts of possible solutions.....slave cylinder spacers(to allow air to provide cooling of the unit, the thinking was the spinning rod inside the cylinder was heating the clutch fluid), slave cylinder upgrades (full replacement with aftermarket units), re-routing of the clutch line (the thinking was, since the line was resting on the engine the engine heat was boiling the fluid).....then there was the pin hole in the clutch lever boot, with out a pin hole(so it was thought) air was getting forced into the system as the lever was actuated.....

There may be other theories but I covered most of them - none proved to work, at least none worked for me......I've had ducs since 1995, and I've had this issue on all of my ducs except the original 1995 916......including a desmosedici

Get yourself a dedicated 11mm open end that you carry with the bike(wrapped in a small shop towel to cover the bleed nipple), for those times you forget to bleed it prior to leaving on your ride.....you'll be happy you have it with you...or get religious with bleeding it when you top off engine oil.......

In the end, save yourself any money in trying "fixes" unless its a proven solution.....in which case I'd appreciate knowing what you found

That is hilarious RD16RR haha
Thank you for the reply - I'm glad to know it's not a considerable fault with my bike (my first Ducati)
To be honest I don't believe it's a big deal - I can add it to my weekly maintenance regimen
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Old Jan 28th 2013, 05:50 PM   #4
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Originally Posted by bishopau View Post
That is hilarious RD16RR haha
Thank you for the reply - I'm glad to know it's not a considerable fault with my bike (my first Ducati)
To be honest I don't believe it's a big deal - I can add it to my weekly maintenance regimen
I'm glad you enjoyed the read.....

I tried hard to make it part of my routine, but age has been creeping in, and I found myself leaving my driveway moaning to myself that I'd forgotten to bleed it, refusing to stop as I am a creature of habit, and dislike removing my helmet, gloves and ear plugs all to be a slave to the slave cylinder.....buddies eventually tired of me asking for their tools (so I wouldn't have to open mine) so I learned to carry it within easy access - it's always worth it, as the bikes are so rewarding !
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Old Jan 28th 2013, 06:52 PM   #5
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I've just got to find an 11mm wrench that will fit in the hefty cargo bay of the 1199 hah
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Old Jan 28th 2013, 06:59 PM   #6
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Originally Posted by bishopau View Post
I've just got to find an 11mm wrench that will fit in the hefty cargo bay of the 1199 hah
I carry this with me everywhere...



Fits in the trunk under the connector cover.
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Old Jan 29th 2013, 06:38 AM   #7
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Originally Posted by bishopau View Post
I've just got to find an 11mm wrench that will fit in the hefty cargo bay of the 1199 hah
-- get any old one....you can cut it down to fit....but be sure you don't hack off the wrong end (don't ask!)
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Old Jan 29th 2013, 08:55 AM   #8
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Originally Posted by bishopau View Post
Hi All,
I've done 5000km / 3500mi on my 1199 S
I'm finding that the clutch is starting to engage further to the bar the more I use it. Not drastically but I've had to bleed air out of the nipple near the slave cylinder twice now. I've wound the clutch lever out fully using the knob near the pivot point.

Before I take it into Ducati, any thoughts on what I could try?
I am thinking it might be a pinched o-ring on the slave cylinder or something.

Thanks alot!
I just noticed this happening after i put on the the new DP levers. Not sure if that's a coincidence Thanks for the info, but it's been 10 years since I bled lines.
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Old Jan 29th 2013, 09:05 AM   #9
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-- 10yrs !!??.....i'd go get some new fluid
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Old Jan 29th 2013, 09:06 AM   #10
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Originally Posted by RD16RR View Post
-- 10yrs !!??.....i'd go get some new fluid
Yes, I got the prototype pani
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