I use to ride with a guy that was a BMW lover. He has 2 r75s and one other. The r75 he rode the most had like almost 200k miles on it. It ran like a top. I have never owned one but know several people who do and they love them. However, you are correct Japanese bike are world wide and easy to get parts for when they break which would be the biggest consideration if I was going a bike tour. I have looked at getting an adventure bike but I find the standover height to be too high.
I use to ride with a guy that was a BMW lover. He has 2 r75s and one other. The r75 he rode the most had like almost 200k miles on it. It ran like a top. I have never owned one but know several people who do and they love them. However, you are correct Japanese bike are world wide and easy to get parts for when they break which would be the biggest consideration if I was going a bike tour. I have looked at getting an adventure bike but I find the standover height to be too high.