conclusion to fixing the clutch
Understand most of you doing a clutch change will notice that your outer basket clutch plate has worn down and has scraped up the basket...My steel plate idea originally was to stop the judder and crappy engagement ,,but when I saw how badly my basket surface was adding a steel plate over the surface wear was the only way to fix a bad basket surface ...or goto a machine shop and have the surface cut down,,but that would add to the problems of the stack height further ...So this was the cheapest and easiest way to go ..
The anti judder spring and plate was BMW's way of trying to fix a bad stack height and they failed miserably ..
So for a quick fix I took out the spring retainer seat out ..Its the round wire steel that goes in between the diaphragm spring and the outer basket... .So the results are amazing ..The clutch grabs like hell..Stack height is better than original... ..I believe when they developed this clutch the whole issues were in fact the stack height being too short thus making the spring in a position of not having full tension on the plates causing not a full force engagement ...That would cause a judder all day long and premature wear ...My bike does not judder the slightest bit and I am running 15-40 oil no less ...No oil getting the the 1st plate was a bit of a problem so I drilled a hole to fox that issue but not getting full engagement will wear and judder and clutch trust me ..
The basket is legit only off a half of a steel plate thickness ..Not much but is a lot when u are dealing with stack heights ..
I will take this clutch out and inspect my spring seat to see how badly it wore out ..When I inspected the original spring and seat it didnt seem to show really any wear at 50k miles ...So Im not so sure that it will show any significant wear ....
So u have 3 options
1......add a steel plate from ur old clutch and take off spring retainer ..
2. Add a steel plate and take that plate and have any machine shop mill it to 50% of the thickness ..
3. Add steel and have your basket milled down 50% of the original steel plate thickness ..