Originally Posted by moymurfs
Is this on the outside of the FD (where the black plastic ring rotates) or on the inside where the wheel mounts?
It's the smaller outer seal under the black plastic ring.
I had the same seal leak on my K1300GT (just a week or so before the IBR) which caused me quite a bit of concern at the time. A trusted BMW mechanic replaced the seal, and said he'd seen several RT-P Authority bikes with similar issues.
I watched him pull the old seal and it was pretty easy. Like dkjkwood said, remove the black plastic seal cover, drill some small holes (not to deep), then put a screw into the holes so you have something to grab onto and pull it out. The new seal goes in using a Special BMW Seal Driver Tool which pushes the seal in cleanly and uniformly, and not too deep. Then push the plastic cover ring back on. It took maybe 10 minutes total.
After watching all of this, I made my own seal driver tool based on the official BMW tool's dimensions and carried a new seal with me on the IBR, but I never needed it. At least it was a lot smaller and lighter than carrying a whole final drive, which I have done, along with all the tools needed for a field swap . . .
'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...