Whatever angle you put gauges at that you can see, you will at some point have a reflection with sun to your back.
Unstable issue can be, tires cupped or inflation wrong, steering head bearings loose or need replaced, swing arm bearings loose or need replaced, front wheel bearings need replaced, wrong torque on front or rear axle.
Speedo cable probably needs lubed for howling.
Odometer could be broke gear between odometer & speedo.
I have a replacement instrument cluster if you find you need it.
Gary