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Old 02-14-2013, 12:21 PM   #7246
BK.RD.RNR
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Originally Posted by crankshaft View Post
Unless you plan on riding off road. HDB rear signals are far better, I've had the same set on four different bikes and have had no problems.
Have you used the SicAss ones? I have about 20k miles on mine, and took them off the 08 and put them on the 2012.

Maybe you have not had any problems because you turn over your bikes so quickly.
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Old 02-14-2013, 01:20 PM   #7247
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Originally Posted by BK.RD.RNR View Post
Have you used the SicAss ones? I have about 20k miles on mine, and took them off the 08 and put them on the 2012.

Maybe you have not had any problems because you turn over your bikes so quickly.
I went through about 3 sets of sicass turn signals on the back of my bike. They kept getting knocked off and after a while they don't like to go back together.
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Old 02-14-2013, 01:27 PM   #7248
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I would suggest not riding it anymore until you replace the slave cylinder. I made the mistake of going through the process you describe a few times, did not replace the slave, and the main bearing ended up letting loose on me causing thousands in damage. I now believe it was from the mineral oil leaking into the bearing. YRMV.
I've heard of this theory before, and I just can't wrap my head around it. There just isn't any way that the very small amount of mineral oil seeped into the 1.8 LITERS of motor oil could do that to the bearings... I mean, the entire system takes MAYBE an ounce? There's just no way...
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Old 02-14-2013, 01:36 PM   #7249
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I've heard of this theory before, and I just can't wrap my head around it. There just isn't any way that the very small amount of mineral oil seeped into the 1.8 LITERS of motor oil could do that to the bearings... I mean, the entire system takes MAYBE an ounce? There's just no way...
There is one way to find out. It sounds like this theory needs to be tested. Please keep riding the bike and let us know if things gets expensive...then we will avoid doing it
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Old 02-14-2013, 01:37 PM   #7250
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Originally Posted by BK.RD.RNR View Post
Have you used the SicAss ones? I have about 20k miles on mine, and took them off the 08 and put them on the 2012.

Maybe you have not had any problems because you turn over your bikes so quickly.
20k miles on the road..... Did you miss the part about off road? Yes, had the Sicass signals, ended up breaking them off.
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Old 02-14-2013, 01:59 PM   #7251
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Any more pics or are we just gonna internet duel over the merits of each brand. This wasn't an oil question.

Thanks for the pics so far. I like those. Kinda flush yet stick out some. My taillight is LED with intergral turn signals. Every littls bit helps.
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Old 02-14-2013, 02:34 PM   #7252
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Originally Posted by Kirk the Jerk View Post
I've heard of this theory before, and I just can't wrap my head around it. There just isn't any way that the very small amount of mineral oil seeped into the 1.8 LITERS of motor oil could do that to the bearings... I mean, the entire system takes MAYBE an ounce? There's just no way...
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There is one way to find out. It sounds like this theory needs to be tested. Please keep riding the bike and let us know if things gets expensive...then we will avoid doing it


Please do report back with your findings.

Granted I did not change engine oil every time I flushed the clutch system, but the closest bearing to where I suspect it would leak out is the one that failed, and no one else has heard reports of the main bearing failing.
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Old 02-14-2013, 02:35 PM   #7253
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20k miles on the road....
Yeah, ok Mr. Hardcore.
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Old 02-14-2013, 02:44 PM   #7254
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There is one way to find out. It sounds like this theory needs to be tested. Please keep riding the bike and let us know if things gets expensive...then we will avoid doing it
From Magura themselves: "No. It should be fine."

Regardless of the tiny amount that can get into the engine, there aren't any abrasive or corrosive properties to mineral oil. We're not talking brake fluid, or other glycol based fluids like hydraulic fluid. Just because it has "mineral" in the name does not mean it has any abrasive properties. It is used in machining and knife sharpening because it is a great lubricant, floating the material being removed away from the working surface.

Quote:
Originally Posted by BK.RD.RNR View Post


Please do report back with your findings.

Granted I did not change engine oil every time I flushed the clutch system, but the closest bearing to where I suspect it would leak out is the one that failed, and no one else has heard reports of the main bearing failing.
There's also a guy on Supermoto Junkies who had to replace his countershaft because it SNAPPED IN HALF with only 3K on the clock. Stranger things have happened...

We'll see if my main bearings go, but I've got about 5,000 miles on my bike since the fluid started going grey.

Either way, I've ordered an Oberon slave. Seems the LC8 and RC8 folks have had great experiences with their slaves...
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Old 02-14-2013, 02:50 PM   #7255
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Originally Posted by Kirk the Jerk View Post
From Magura themselves: "No. It should be fine."

Regardless of the tiny amount that can get into the engine, there aren't any abrasive or corrosive properties to mineral oil. We're not talking brake fluid, or other glycol based fluids like hydraulic fluid. Just because it has "mineral" in the name does not mean it has any abrasive properties. It is used in machining and knife sharpening because it is a great lubricant, floating the material being removed away from the working surface.



There's also a guy on Supermoto Junkies who had to replace his countershaft because it SNAPPED IN HALF with only 3K on the clock. Stranger things have happened...

We'll see if my main bearings go, but I've got about 5,000 miles on my bike since the fluid started going grey.

Either way, I've ordered an Oberon slave. Seems the LC8 and RC8 folks have had great experiences with their slaves...
I was not commenting so much on a belief that there was an abrasive involved, as a concern for lack of viscocity compared with the fully synthetic Motorex.
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Old 02-14-2013, 02:57 PM   #7256
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I was not commenting so much on a belief that there was an abrasive involved, as a concern for lack of viscocity compared with the fully synthetic Motorex.
Didn't mean to come off that way.

I suppose it's possible there would be a lack of viscosity compared to the Motorex, but there are SO many of the LC4's, LC8's, and RC8's with failing Magura's, you'd think it would be more wide spread.

If mine is leaking, which I'm near positive it is, it's leaking very, VERY slowly. The bike just doesn't have the clutch action it should, especially how smooth it operates after a bleed. But it's still working. Most people probably wouldn't be able to tell.

How many miles did you put on the bike while the slave was taking a shit?
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Old 02-14-2013, 03:08 PM   #7257
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...
How many miles did you put on the bike while the slave was taking a shit?
I could not say for sure, but once I got to the point where it seemed to need the flush/ bleed done a few times in a few months, the bearing failure snuck up on me in one ride, and the bike and I ended up coming home in a truck.
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Old 02-14-2013, 03:09 PM   #7258
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Before I replaced my o-ring I was leaking inside for many months. Never really identified what was going on until the o-ring finally failed outright. I had maybe a thousand miles that way 90% off-road. Since we change oil so often in the RFS it never was an issue.
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Old 02-14-2013, 05:00 PM   #7259
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Seems the LC8 and RC8 folks have had great experiences with their slaves...

Hey now... this isn't Django Unchained!

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Old 02-14-2013, 05:07 PM   #7260
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There is one way to find out. It sounds like this theory needs to be tested. Please keep riding the bike and let us know if things gets expensive...then we will avoid doing it


Well, my slave cylinder failed completely, no slow dying so I didn't get to try that theory out.
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