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Hydraulic clutch slave cylinder

Araitim

Araitim

Joined Sep 2017
595 Posts | 121+
Lansing Mi
Are all Ducati hydraulic clutch slave cylinders the same bolt pattern? I'm not finding much info aside form piston diameter. I see many piston ratios between the models but nothing about but pattern and spacing. When looking at a hydraulic clutch control conversion for the 821/939 I see 2 links in the sale post but they seem to be the same as every other
 
I know on the 821 Engines, there is a hole for the clutch rod to go into on the left side that is covered up my a plastic cover/front sprocket cover. So there should be only 1 bolt pattern for the clutch slaves. I will be doing the hydralic clutch conversion on my bike next month. Parts are just sitting here but cant do it until my garage is finished being built. I will posting my installation on here after.
 
saken said:
I know on the 821 Engines, there is a hole for the clutch rod to go into on the left side that is covered up my a plastic cover/front sprocket cover. So there should be only 1 bolt pattern for the clutch slaves. I will be doing the hydralic clutch conversion on my bike next month. Parts are just sitting here but cant do it until my garage is finished being built. I will posting my installation on here after.
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Have you started this conversion yet? I have individual parts ordered. Can you take a few measurements of the stainless button that gos in the clutch hat bearing as well as how long the push rod is please?
 
Any traction on this mod? I had some trouble after installing the OEM clutch fix and am half tempted to just swap to hydraulic.
 
gatdammit said:
Any traction on this mod? I had some trouble after installing the OEM clutch fix and am half tempted to just swap to hydraulic.
Click to expand...

Slave cylinder, rod and line will be under the tree from the kids. Just need to get a master cylinder. Apparently all of the 2002 and newer can swap out slave cylinders and there are only 2 or 3 different rod lengths. Also, the back side of the original center bobbin in the clutch hat appears as though it is already machined to accept the rod. It's as though ducati wanted to do this to the hyper but went with the cheaper cable clutch instead. It is all drop in from what I'm reading. One thing I have come across, when looking for rods and slave cylinders you want to find one that has the 'anti spin' cross pin to prevent it from spinning within the slave cylinder. I'm excited to mess with it.
 
Ducabike Hyd Clutch

Editing and time lapse aside, it looks extremely easy. Did you go with the Ducabike parts? When I looked up the kit, the slave cylinder was not included and it didn't say what specific part to order. What did you come up with?
 
gatdammit said:
Well, damn. The parts list is in the video description. Doh!
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I went with factory OEM used stuff. The kits out there are ridiculously expensive and like you said, the ducabike doesnt even come with the slave cylinder. I'll post the list when I get it together. I think it can all be done for $100-150 using low mile OEM parts. If it all works I could upgrade to more fancy pieces over time. The most expensive piece will be the master cylinder.
 
I'm willing to pull the trigger on the Ducabike parts. Unfortunately, I can't find anyone that will ship to FPO. I wrote Ducabike for assistance.

What OEM model parts are you using?
 
gatdammit said:
I'm willing to pull the trigger on the Ducabike parts. Unfortunately, I can't find anyone that will ship to FPO. I wrote Ducabike for assistance.

What OEM model parts are you using?
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The 998,1199, 1299 slave with line and a 2016 959 push rod. I still need to come up with the master. I dont like the kits because of how expensive they are, the fact that they dont come with a slave cylinder and (a side from the ducabike kit) the master cylinder is not a radial master. The ones I seen are old tech axial masters. I can get a new megura HC1 for $150 plus the used parts I'm getting for Christmas($50 + $10) and have the whole thing done for $200. Or do some digging and find a used master for $50-100 and only be into it for $100-150. The ducabike kit is $375 + the cost of a slave cylinder. Hopefully it all works out.
 

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****, the Ducabike cart I loaded was $1200, but that's for the wet clutch window, pressure plate, spring retainer, slave, lever/ line kit. Good to know the Duca kit is at least a radial.

You didn't mention lever w/ reservoir. What are you doing about that? I'm a little upset because I like my cheap shorty levers. Hopefully I can swap them.
 
gatdammit said:
****, the Ducabike cart I loaded was $1200, but that's for the wet clutch window, pressure plate, spring retainer, slave, lever/ line kit. Good to know the Duca kit is at least a radial.

You didn't mention lever w/ reservoir. What are you doing about that? I'm a little upset because I like my cheap shorty levers. Hopefully I can swap them.
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I'm currently undecided on the master cylinder. I want to see what I can find used. I'd like a radial one but it wouldn't match the front brake master cylinder. It all depends on what I can find for a good deal. The RSC billet clutch I have was like $130. Its crazy to think that for a few dollars more I could have done what I'm doing now. You dont need to do the clear clutch window to do the conversion. I was also kicking around the idea of machining my old cover, brazing on a ring and making a clear cover of my own. There is a guy who does exactly that for the DRZ and they work great and look great. I feel I'm being a little ambitious though. We will see how the hydraulic conversion gos first. I can get the megura hc master for $120-150. If I buy new that might be the one I go with. It's the same one that most of the stunt riders use as a left hand rear brake and is highly regarded.
 
You'll need to plug the old clutch throw out arm if you keep the stock cover. I guess you could just cut up the stock piece.

It's over the top but my case has rash from a bad storm anyway. My bikes been down for too long. I just want to get it running again.
 
I hated the clutch when I first got the bike. When that judder spring modification finally came to fruition I jumped right on it. It really does make the bike more comfortable on a day to day basis. I tried to swap out to the RSC clutch first to compensate. It helped but not enough. I have read that the hydraulic system moves the clutch more. That might help. The back side of that center push/pull button looks like it's already machined to accept the push rod. Worse case scenario, I cut the pull piece off the button, pull the arm out of the cover and plug the hole .
 
For anyone following this, found that Permatex Ultra Grey RTV is a good substitute for Ducati ThreeBond which, despite it's price, is not made of crushed diamonds and gold. Honda RTV is very good, as well.
 
I also like the permatex grey. That's what I use when assembling engines, even when putting 2 halves of a case together. Very good product. My Andreani fork cartridges came yesterday. Any tips for me? I will be doing it at home. I made a clamp for the fork lower yesterday. The tool that needs to clamp the shiny part of the fork to separate it from the lower axle mount. I have read a few things about machining the set screw vs just hammering a torques bit in and just backing it out. What dis you do.
 
DISCLAIMER: I took mine to a shop. Just moved to Italy and don't have a garage, let alone most of my bench tools.

Did read up on them. As long as you are good with an angle grinder, no prob. Filling the tubes with oil seemed like the messiest part. You'll need to check alignment but bike wheels are relatively easy. I'd get a good suspension setup before hand. Then, if you need to drop your triple tree, you'll already have a reference line. The adjusters are difficult to access with the bars in the stock position. I ordered some pre-load hand adjusters that mount to the top of the cartridges.
 
Just realized the stock sprocket cover won't fit when slave cylinder is mounted. You could probably cut the stocker. Ducabike sells one that is cut for the slave.
 
gatdammit said:
Just realized the stock sprocket cover won't fit when slave cylinder is mounted. You could probably cut the stocker. Ducabike sells one that is cut for the slave.
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I seen that too. I intend on cutting the original one (or leave it off) till I can afford a fancy one that is already cut. Not a big issue.
 

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