In a single word, Yes.
Sidecars have to be aligned with the chair much as the front end of a car.
The alignment is the rear wheel of the bike with the sidecar wheel. Correct alignment is just as necessary on the set up as it is on your car. When you remove the chair and reinstall it measurements are critical. All chairs set up a bit differently and they reinstall a bit differently, just saying.
I currently have three units I own in my garage and they all require realignment when reinstalled, The two BMWs are much easier to do but they are much simpler bikes and (especially the R27) run much slower than the Valk.
Even after this major service I will take the time to at least carefully check the alignment. This bike ran quite well this summer and was very comfortable pulling a camping trailer at 70 - 80 MPH from Muscogee to SF in three days.
Bikes with sidecars on the right hand side pull to the right with acceleration and pull to the left with rear braking of closing the throttle so the set up must be dialed in or you may find yourself pulling quite hard on the left bar just to go straight when going uphill or into a wind, and I will say the wind has never been blowing in a preferred direction when crossing Wyoming no matter which direction I have been going.
YMMV
bill.
