Yes, the power/weight-ratio has increased.
I have not done any research about this, but the new F800GS is heavier then the R80G/S (and R80/100GS dependent on model) which is up to 27 years older. The new Tenere is heavy, is it lighter then the old one?
But it’s true for lots of bikes.
Maximum power has increased during the years, torque have also increased but not that much. (There are exceptions here!)
It’s difficult to make an engine with both good torque in the cruising range and high maximum power. My theory is that the focus on maximum power leads to less low end torque then if we had start focusing different.
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