Torque output isn't represented on that graph. Only RPM and % Eff. There would be a third trace if torque was on there.
Ah ? I believe that the green curve is the Torque output for a given RPM value. As far as I know One can't go without the other.
"We'll never have a ROAR legal motor. They're all copies of Novak's design. We're not willing to copy what we consider to be an inferior motor"
- Joe Ford - my new hero