K1 paralever drive shaft phasing

[GbinCH]

Hi
I was watching a video on Youtube about disassembly and greasing the paralever shaft final drive splines.
In the video there was no mention of the need to 'phase' the two shaft halves on reassembly. Is this necessary and if so how do you do it?
My BMW is one of the early 1989 K1 models without ABS.
Best
GB

[alexis291]

I've just serviced The drive shaft on my K 1100 RS and did not phase the shaft. If it was meant to be phased there would be a master spline or some means of lining  the two ends up. My bike is running fine with no problems. The Clymer manual does not say this has to be done.

[rbm]

Yes phasing is important.  From the Motobrick card catalog:
Phasing the drive shaft on a 4V K1100
Phasing drive shaft by Duck

[Laitch]

It's important that the U-joints on the 4 valve K bikes are in phase.  How important?  I'm not sure but it certainly can't hurt.

I think this is how a lot of state and federal statutes start out, too.

[Chaos]

Phasing U joints is always a good idea, especially if the driveline is subjected to much angulation.  Unphased joints will accelerate and de-accelerate the driveshaft each rotation, more so the more extreme the angle.

[alexis291]

The K1100 manual (look for it in this forum) makes no mention of phasing. Page 33.17 refers. It won't do any harm to phase of course and in theory aligning the joints reduces variations in shaft speed as the angle of the shaft changes. However in practice it has little effect. If BMW thought it was important it would be in the manual and there would be a master spline.