Ducati Sporting Club UK
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 23-Oct-2018, 12:01
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
999 clutch problem

Hi can anybody help shed light on the following? I have a 999 biposta 2006 deepsump model and the clutch has no feel to it I.e it bites virtually when the clutch lever is fully out. I have read the various posts regarding 999 clutch woes and none of them seem to mention this problem. The clutch has not been bled to cause any air bubbles in the system. Can anybody help or suggest any solution to this problem.
Quote+Reply
  #2  
Old 23-Oct-2018, 23:02
antonye's Avatar
DSC Member antonye antonye is offline
Administrator
Webteam
MotoGP God
Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
 
Posts: 13,053
Join Date: Feb 2002
Mood: Passion Killer
When was the last time you checked the stack height?

If you take all of the clutch plates (friction and steel) and then measure them all together, you want around 38-39mm in total.

If yours measures less than that then you need a new set of clutch plates!


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
Quote+Reply
  #3  
Old 24-Oct-2018, 10:29
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
999 clutch problem

Thanks for your reply Antony’s, the clutch wear should be fine as the bike has only done 7.5k miles?
Quote+Reply
  #4  
Old 25-Oct-2018, 12:46
antonye's Avatar
DSC Member antonye antonye is offline
Administrator
Webteam
MotoGP God
Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
 
Posts: 13,053
Join Date: Feb 2002
Mood: Passion Killer
Quote:
Originally Posted by Ducatsah1
Thanks for your reply Antony’s, the clutch wear should be fine as the bike has only done 7.5k miles?

Not neccessarily! It all depends on setup, wear, use, etc.

Probably worth checking regardless!


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
Quote+Reply
  #5  
Old 25-Oct-2018, 21:43
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
Thanks for the advice I will strip the clutch and check the dimensions before I do anything else. Will let you know the outcome of the investigation when I have completed the task.
Quote+Reply
  #6  
Old 27-Oct-2018, 13:25
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
999 clutch problem

Just measured clutch stack height and they measure 38.3 to 38.4 so clutch plates are ok. Anybody have any other suggestions as to what the problem may be?
Quote+Reply
  #7  
Old 27-Oct-2018, 15:04
antonye's Avatar
DSC Member antonye antonye is offline
Administrator
Webteam
MotoGP God
Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
 
Posts: 13,053
Join Date: Feb 2002
Mood: Passion Killer
Now you know that the clutch stack height is ok, you can work through the system.

Give the plates a good clean with brake cleaner and then reassemble.

It may be worth bleeding through the clutch fluid and even changing it if it hasn't been done for a while; usually it will be done every 2 years as part of the major service.

Give it a really good bleed to ensure you get all the air (and old fluid if you're changing) out of the system and then reset the span adjusters and try again.


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
Quote+Reply
  #8  
Old 27-Oct-2018, 18:54
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
999 clutch problem

Thanks for the advice antonye, I will give this a go and hopefully this will work. I have heard dories of where the sometimes you get fluid leaking past the reservoir seals, but will do the fluid change and bleed first as I know that it hasn’t been changed for well over two years.3
Quote+Reply
  #9  
Old 27-Oct-2018, 18:56
Ducatsah1 Ducatsah1 is offline
Registered Forum User
Newbie
Bikes: Ducati 999
 
Posts: 7
Join Date: Oct 2018
999 clutch problem

Is there a particular sequence for bleeding the clutch antonye?
Quote+Reply
  #10  
Old 28-Oct-2018, 16:53
antonye's Avatar
DSC Member antonye antonye is offline
Administrator
Webteam
MotoGP God
Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
 
Posts: 13,053
Join Date: Feb 2002
Mood: Passion Killer
Just the same as the brakes -

with the bleeder nipple closed give the lever a good pump to ensure you have pressure
hold the lever under pressure and release the bleed nipple, catching expelled fluid
as the lever hits the bar/max travel, close the bleed nipple tight
now release the lever and pump again

You will want to do both at the slave cylinder AND at the master cylinder (at the lever) to ensure you remove any trapped air/fluid

Keep an eye on the reservoir to make sure it stays topped up.

Keep bleeding until you remove any bubbles and you get a nice clean flow of fluid through.

You may find it easier with the lever's span adjuster at the furthest point (largest span).

Discard used fluid responsibly at your local recycling centre!


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
Quote+Reply
Reply
  
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Postbit Selector
Switch to Vertical postbit Use Vertical Postbit

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Recent Posts - Contact Us - DSC Home - Archive - Top
Powered by vBulletin 3.5.4 - Copyright © 2000 - 2024, Jelsoft Enterprises Ltd. - © Ducati Sporting Club UK - All times are GMT +1. The time now is 18:58.