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Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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Ducati sticky clutch discs - clunk into first gear. Tricks?
this is on a ducati wet clutch, but I'm sure it also applies to any wet clutched motorcycle.
I hate when the clutch discs stick (the oil between the discs creates suction or surface tension and holds some of them together), and make the drop into first gear clunky. It doesn't do it all the time, most of the time it's fairly smooth. But sometimes is a pretty good clunk. Are the some good tricks any of you use to stop it? While the bike is in neutral, I can hold the clutch lever in and give it a few revs before dropping it into first, and that seems to help sometimes. Not a preferred method, though, because of the noise! I replaced the clutch this weekend, BTW. It does the same thing with the new as it did with the old. |
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06-05-2017, 12:29 PM
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Join Date: Mar 2004
Location: Higgs Field
Posts: 22,627
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Are you sure the release is adjusted properly? Are you using a wet clutch compatible oil? Does it only do it when cold, or when hot, or all the time at random?
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Jeff '72 911T 3.0 MFI '93 Ducati 900 Super Sport "God invented whiskey so the Irish wouldn't rule the world" |
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06-05-2017, 12:33 PM
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Checked out
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It's a hydraulic clutch. I don't think there is any adjustment on it.
But yea, it seems to be operating properly. When I had the clutch cover off, I could pull the clutch in and see it operating. Seems fine. It's just sometimes the oil between the discs makes some of them (not all of them) stick. I use a Motul oil that I get from the Ducati dealership (I don't have the specs here), so it should be ok. Seems kind of random. I guess it does it a bit more when cold, maybe. |
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06-05-2017, 12:55 PM
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Join Date: May 2004
Location: Lake Cle Elum - Eastern WA.
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Synthetic oil helps.....also, B4 you start, put it in gear and rock back and forth with the clutch in. That helps break it loose.......Issue is usually worse the longer the bike sits between rides.
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Bob S. 73.5 911T 1969 911T Coo' pay (one owner) 1960 Mercedes 190SL 1962 XKE Roadster (sold) - 13 motorcycles |
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06-05-2017, 01:22 PM
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Slackerous Maximus
Join Date: Apr 2005
Location: Columbus, OH
Posts: 18,183
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I refuse to acknowledge a motorcycle with a wet clutch as a 'Ducati'
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2022 Royal Enfield Interceptor. 2012 Harley Davidson Road King 2014 Triumph Bonneville T100. 2014 Cayman S, PDK. Mercedes E350 family truckster. |
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06-05-2017, 01:36 PM
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B58/732
Join Date: Feb 2000
Location: Hot as Hell, AZ
Posts: 12,313
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My Kawasaki Concours did the same thing. Every. Single. Time. I (and others) call it the "Kawi clunk".
Learn to love it or follow HardDrive's implied advice.
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ΜΟΛΩΝ ΛΑΒΕ I don't always talk to vegetarians--but when I do, it's with a mouthful of bacon. |
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06-05-2017, 01:52 PM
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Quote:
Quote:
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Jeff '72 911T 3.0 MFI '93 Ducati 900 Super Sport "God invented whiskey so the Irish wouldn't rule the world" |
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06-05-2017, 03:29 PM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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You should look into Red line oils. Frequently the OEM spec primary oil for most wet clutch bikes tend to be on the heavy side viscosity wise. They have a tech line with knowledgable people.
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06-05-2017, 03:42 PM
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I see you
Join Date: Nov 2002
Location: NJ
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Si non potes inimicum tuum vincere, habeas eum amicum and ride a big blue trike. "'Bipartisan' usually means that a larger-than-usual deception is being carried out." |
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06-05-2017, 03:43 PM
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Checked out
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No, it doesn't matter how long it sits. Anyways, that seems like it would only affect the first shift of the day.
The wet clutch is actually kind of weird design. With all that oil in there, and so many clutch plates and steel discs, it seems like much of the time, you're going to get "sticktion" between some of those plates and discs. It doesn't take much sticktion to keep things spinning a little when the clutch is pulled in, and getting the clunk. It does seem like the properties of the oil probably has the biggest impact. I put around 50 more miles on the new clutch and oil today, and it actually seems to have improved quite a bit. |
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06-05-2017, 04:22 PM
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Location: AZ
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Quote:
If you just replaced the clutch (including basket), then the other likely culprit is the cush drive (rubber dampers) on the rear hub. |
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06-05-2017, 08:19 PM
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Join Date: Jun 2012
Location: nj
Posts: 599
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Try bleeding the clutch slave?
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06-06-2017, 05:51 AM
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Burn the fire.
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My Octane does the same. Lots of discussion about it on the Victory boards (a lot of other Vics do it) and on the new Indians. Best solution is what Bob recommended.
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[x] Working | [_] Broken: 2017 Victory Octane [x] Working | [_] Broken: 2005 Ram 1500 SLT w/5.7L Hemi "Drive it like you stole it." |
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06-06-2017, 06:49 AM
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06-06-2017, 04:30 PM
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Don . "Fully integrated people, in their transparency, tend to not be subject to mechanisms of defense, disguise, deceit, and fraudulence." - - Don R. 1994, an excerpt from My Ass From a Hole in the Ground - A Comparative View |
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06-06-2017, 07:36 PM
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