Here's an odd question for you.. Will an 1150GS tailshaft fit a K1100? The reason for asking is that I have a very good 1150GS tailshaft  - if it fits the K1100 then I'll keep it, otherwise I'll sell it.

Hi Phil, using RealOEM parts fisch it seems that they are not interchangeable.

K1100 (LT or RS) driveshaft is part number 26112325

R1150GS driveshaft is part number 26117655802

Cheers