I have a 2004 R1150RT with a small oil leak from the rear boot of the drive shaft. I'm wondering what would be causing the leak and how much work it be for me to fix it? I'm ok with a wrench and enjoy working on my bikes but this bike is new to me and I shy about tearing it apart with out having some idea of what I'm getting into.

I'm totally blown away with how much I've learned about the R1150Rt from the Forum. Any help would be appreciated.IMG_0775.jpg