S2R 800 clutch damage

[Betlog]

Simply put, the large nut holding the clutch basket is undertorqued and as it becomes looser symptoms form as innocous as a rattle/vibration all the way to catastrophic failure like we had. At least that's how it was explained to me.
And if you don't trust your dealer to check the torque, I'd make them pull the clutch cover and call me to come see it before they put it back together.

Sorry to bring this up again but this thread was referenced from one of the newer threads.  Anyway, this has got me worried.  What kind of "vibration" would this be?  From the clutch case?  Does it happen on neutral, or only when in gear and riding?  Any advice and/or tips for this issue?  Thanks.

[Betlog]

BTW, further research on this issue led me to a thread with some useful info (sorry for a link to another forum) where one of the folks who had this happen to him twice replaced the part with one from a 620 which does not have the springs.  http://www.ducatimonster.org/forums/tech/155497-2005-s2r-clutch-noise-found-cause.html

[corey]

I know this seems like it happens a lot, and I'm not discounting the people it HAS happened to, but let's keep in mind that the only people who post up about this problem are the ones that experience it. We've got maybe 10 cases of this occurring that we can account for now?

What I'm getting at is that either the clutch is going to grenade itself, or it's not... and I'd say there are many more S2R800's out there that will never have this problem (more likely to replace the clutch before it does) than those that will.

Were it me (and it is!), I'd ride the bike, and next time I have it in for a service, have the dealer "check the clutch out because you've heard of some people having catastrophic failures."

I recently had my side cover off. Clutch nut was much more than hand-tight, so I let it be.
If it ain't broke, don't fix it.

[stopintime]

..........

I recently had my side cover off. Clutch nut was much more than hand-tight, so I let it be.
If it ain't broke, don't fix it.

Having in mind how expensive and potentially dangerous this can be, I'd like to fix it before it happens (again)
"Much more than and tight" is not a useful test on this nut.... it's tightened with 190Nm.

[Betlog]

Having in mind how expensive and potentially dangerous this can be, I'd like to fix it before it happens (again)
"Much more than and tight" is not a useful test on this nut.... it's tightened with 190Nm.

I guess the question is... how dangerous is it?  If this happens while riding, will it cause the rider to lose control?

[corey]

I guess the question is... how dangerous is it?  If this happens while riding, will it cause the rider to lose control?

if you're moving, I imagine it's lock-up city for sure.

[BK_856er]

My $0.02 as follows:

(a) You are the paranoid type and/or track your bike.  Remove the clutch cover, remove & degrease the hub nut, inspect cush spring area if so equipped, reinstall hub nut with a suitable threadlocker and proper torque.

(b) You are experiencing new and unexplained NVH, possibly related to clutch use.  See (a) above.

(c) You want to stay on top of this rare event to avoid a costly failure.  Remove the clutch cover and torque the hub nut at some upcoming oil change.  I checked mine for the heck of it and it was barely more than hand tight.  Installation of a cover gasket from CA-Cycleworks will make future checks easier.

I verified my hub nut about a year after tightening it, and all was good.

If I had to do it again, I would probably use the new lubricated threadlocker from loctite.

Below is a pic of the Ducati tools in use (large billet basket holder and three clutch assembly screws).

BK

[Betlog]

Is this something where once it starts happening, failure is sudden OR is it a progressive thing?

[Betlog]

I checked mine for the heck of it and it was barely more than hand tight.  Installation of a cover gasket from CA-Cycleworks will make future checks easier.

P.S. link to gasket?  I looked but could not find on their site.

[BK_856er]

http://www.ca-cycleworks.com/ca-cycleworks-oil-clutch-engine-cover-gasket-gaskets

Apply grease to at least one side to facilitate later removal.

BK

[Betlog]

http://www.ca-cycleworks.com/ca-cycleworks-oil-clutch-engine-cover-gasket-gaskets

Apply grease to at least one side to facilitate later removal.

BK

Cool.  Thanks.

[corey]

BTW, further research on this issue led me to a thread with some useful info (sorry for a link to another forum) where one of the folks who had this happen to him twice replaced the part with one from a 620 which does not have the springs.  http://www.ducatimonster.org/forums/tech/155497-2005-s2r-clutch-noise-found-cause.html

is this problem one in the same as the clutch nut backing off? it seems like an unrelated failure of the cush drive springs?

[Speeddog]

is this problem one in the same as the clutch nut backing off? it seems like an unrelated failure of the cush drive springs?

No, clutch nut backing off is a totally seperate issue.

[ducatiz]

P.S. link to gasket?  I looked but could not find on their site.

PS it's the same gasket on all 2v and early 4v models

[corey]

okay so...
what this is all basically boiling down to... is that the S2R APTC unit is a piece of garbage in general. Got it.