my dad is ready to downsize his motorcycle. He’s currently on a 2015 HD Road Glide that’s really comfortable but is over 900 lbs! We just rode around Lake Superior in August and camped for 3 nights so he’s still wanting to be able to take a trip but the big heavy bike is just too much for him. He’s not interested in a trike or 3 wheeler . He is thinking maybe BMW or Triumph , needs low seat height, and easy knee angle. What should I suggest he looks at?