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Old Dec 20th 2018, 12:44 PM   #1
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Your Hydraulic Systems WTF?

Ok guys, Just my own experience. This is not intended to criticize or berate anything. Just my own experience with the main Ducati that I ride, some questions to ponder and maybe, a logical observation. I’m looking back on the subjects of hydraulic fluid discoloration and what seems to be a never-ending saga of frequently bleeding hydraulic systems that should not require this process. I do not have any experience with these issues so I thought I would take the oldest bike in the stable and look at it. All of this is from a 2015 1299 DIY bike so there are no factory “Ducati supplied” OEM pieces in this system just as a reference. The bike was completed sometime late 2015 or early 2016, I don’t remember. The bike has just shy of 16K miles on it. To date the rear system has never been apart. The rear brake caliper is a billet Brembo unit. The Rear Brembo MC was filed, and the rear assemble was bled at the time of the build. Today is the first time since then that the rear MC cap has been removed. This system except for initial installation has never been bled or serviced. The lever travel is 2-3mm before engagement and the pedal feel is rock solid. As you can clearly see, the fluid looks the same as the day It went in. There is zero discoloration at all. Next, I looked at the front. You can see from both the clutch reservoir and the brake reservoir that the fluid is clear and to spec as it came from the Motul container. These reservoirs have never been serviced. Both the clutch and Master are Brembo GP. Both MC’s are extremely positive with no discernable degradation in feel. The lines are Teflon “Aeroquip”. There is no ABS system on the bike. The front calipers are 32/36 Brembo XA7G210/211. They have been serviced 2 times (new seals) however they were bench filled and reinstalled in the system (Staubli disconnects) so the rest of the system from female Staubli to reservoir has never been serviced. The clutch is EVR and the slave is standard Oberon. The slave has been changed but it too has a quick connector, so the rest of the system has not been touched. Personally, I have never once gone to the shop, grabbed a bike and thought, “gee, I better bleed the hydraulics” that is just comical. I have never bled the brakes or the clutch before riding the bike and I ride it daily. How many people here hop in the car in the morning and pause to ponder whether or not they should check the brakes before they head out? RD16RR I believe you have a Corvette, bleed those brakes this AM? Sherpa23 a fellow Mercedes driver, how about that S65, how often do you get out the MityVac and tend to those ceramic wonders? What do you think would happen if Mercedes told you “oh yea, that’s just part of owning a MB? Point, if you have discoloration of the fluid in your hydraulic system and or you need to constantly bleed your system’s they my guess is (and it’s only a guess here folks, so I may certainly be wrong) that you probably have a compromised system from one or a number of factors. Might want to call Brembo, Wilwood, Baer or AP and ask them, describe your morning ritual and see what they think.
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Old Dec 20th 2018, 12:49 PM   #2
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Also here are the front brake lines , caliper and the ABS delete
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Old Dec 20th 2018, 04:08 PM   #3
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Nice build ED!!! Do you still Race or ride the track a lot? Maybe we could hookup sometime next season .. Yes my post is off base from your subject.. LOL.. I believe I spy Lightech R rearsets? My favorite, I install on all my Race bikes...
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Old Dec 20th 2018, 04:15 PM   #4
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LOL no, I def live vicariously through the machine's ability. I can still get around a track but its not pretty. Yep modded Lightech. Pretty good stuff.
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Old Dec 20th 2018, 05:48 PM   #5
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I Ride: Panigale V4 "S", 2009 Xerox 848 , 2003 Honda 1100XX, 2009 Repsol 1000 Fireblade 50th Anv model
The only thing I can think of Endo with the rear brake cyl on your bike is the fact it is cast/ machined whilst my V4's one is made of a plaky material allowing more heat transference.
My fluid has stayed clear with the brake & clutch but at @2500klm's the rear brake fluid looked like someone had dropped purple dye into it and was opaque.
So they flushed & bled it and put some hi tec gear in (F.O.C) will report back on whether it sorts the issue.
If not then replacing the plastic reservior with a cast/machined metal version may be the answer, wonder if Ducati will come to the party on that one probably not anyway will report back

I have to ask those toggle switches hhmmmm reminiscent of say a geared drive unit on the number plate only joking just my WAG...................

Last edited by Cinders; Dec 20th 2018 at 05:51 PM.
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Old Dec 20th 2018, 06:05 PM   #6
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Yea the switches are temporary. I have been putting off putting the carbon fairing stay on and ditching the headlight, putting the switches in the corse switch panel that comes with the stay. It's a hack right now. Switches are manual fan, quick dash function and map switch for the ECU (good gas/shit gas)
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Old Dec 20th 2018, 10:38 PM   #7
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Whew wee, wiping the sweat from my brow...

If you ever want to create a thread showcasing that bike, comprehensive photos down to positively tensioned safety wire, and borderline disgusting levels of cleanliness on a bike with 16k miles on the odo, I wouldnt be mad. Just sayin.
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Old Dec 21st 2018, 12:45 AM   #8
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Endo: You'd better stop moaning about Ducati. Just what the hell would you do with all your time, skills and resources if all Ducatis came reliably built for the purpose, without any marketing and manufacturing optimalization BS. Or did you have to research long to find the perfect brand to improve on?
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Old Dec 21st 2018, 06:29 AM   #9
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Originally Posted by endodoc View Post
Also here are the front brake lines , caliper and the ABS delete
Anyone knows If this ABS delete module Is now available for the V4 somewhere ??
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Old Dec 21st 2018, 08:03 AM   #10
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SNK1199. I don’t hate the brand at all. I’m not a fan of branding in general unless it’s your own company. Unless impossible to remove, you will never find any stickers, decals or logos of any kind on any vehicles I have. I had built HRC kit bikes and that is all I knew. I wanted to try a twin and Ducati made one so I went that route, simple as that. I do not particularly like their engineering on some things and I’m not overly fond of them failing to address issues for their customers that are genuine concerns but that’s not exclusive to Ducati by any means. I buy from Ducati or any other brand what I need and source or build the rest. That way I always get what I want and don’t end up with a garage full of stuff that hits ebay so no I did not choose the brand, I chose who made a platform that suited the mission.
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