How much slop

The other day while riding started to hear a strange noise almost like a bad wheel bearing. Jacked it up and all wheels and bushings felt tight. Noticed rear of drive shaft had decent play. Should they be tight on splines. Replaced u joint but not yoke. Drive it down my street and noise was still there but not as bad. Checked it and yoke still had play. So I orded new rear yoke. Are they suppose to be tight just making sure there isn’t another issue. You would think it would be tight I have 1400 miles on it.