Originally Posted by dwsdad
I can see where the plates would be a wear item, but that basket should last virtually forever.
You sound like this is your first BMW . . .
Clutches generally aren't covered under warranty or extended warranty. The whole package usually just falls under the "wear item" category. Note that some
BMW dealers replaced clutches under warranty for the juddering issue, but more often it was met with "that's normal, they all do that."
So good luck there.
Personally, I think BMW is still getting the hang of these new-fangled multi-plate wet clutches and hasn't quite worked all the bugs out yet. I think they are having problems with the friction material, as well as with the surface hardness of the splines on the inner hub and outer basket. Simply put, they may
stand up to normal, "gentle" riding conditions, but for those who actually use the power and performance of these bikes, the clutches simply aren't up to the task.
In your case, there could be two easy causes for the clutch still being slightly engaged even when the lever is pulled in. First, there could be a problem with the hydraulic circuit such that the lever is pulled, but the slave cylinder isn't quite getting enough pressure to fully compress the springs and thus release the plates. That should
be an easy fix with a fluid change & bleed, along with inspecting for any leaks in the system.
Second, it's possible that your clutch splines have worn many small grooves in them so that the plates don't slide quite as smoothly as they should. That would cause them to hang up a bit and thus still have some engagement even with the lever in, and it would also account for some of the squealing noise and juddering on takeoff. The wear might still be small at this point, such that the problem isn't quite as sever or immediate as it could be.
Two of my three clutch replacements had this exact spline wear problem. I suspect the first replacement did too, but that was done under warranty so I never saw the old parts. But I do think this type of wear is endemic to the new BMW clutches. I also think that the Japanese manufacturers know about this, but they've had decades to engineer their clutches to handle the power of modern inline-4 motors pushing up to 200 HP.
So BMW will get there eventually, but who knows how soon?
FWIW, both of the low-mileage K13GT demos that I've ridden had the clutch squeal present, albeit to a much reduced degree. But it was still there. That, plus the fact that BMW keeps changing the oil spec to deal with this issue tells me that they haven't quite got it licked yet.
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032
All lower 48 states plus Alaska on the K13GT in two weeks . . .
Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...