I fixed my 15 veering problem I think.. it is the only change i made anyway in the last 2 weeks and now it tracks straight as an arrow with no hands for several miles. Mine was really bad as many other 15's reported back in 15. BMW is fully aware of it, as my dealer looked it up on PUMA and BMW documents the issue is riders are reporting problem with no hands riding. Do not adjust.
So my change was the rear shock. I lowered the rear with the spacer that is marked with the red arrow flipped in the lowering position. Made my feet feel better on the ground, and it really made the bike come off the corner better. Little harder on tip in, but, the 15 is so good at this, I gave a little up to have the better exit. And, it appears to have solved the veering problem.
As to the 17 making a little more Vibs.. might be that new Euro4 cat. The thing is so large it might be creating a resonances vib in the frame since it is attached to the frame at the rear section of it.
All Keys Lost programming available now in the US
ECU to Cluster Matching available in the US
Add / delete DDC available