Yamaha lists its model GYT-5TA97-50-00 flywheel as being 1.4 kg-cm^2 inertia weight. How does this translate into the standard ounce designation all the other flywheel manufacturers seem to use? I'm guessing this is an 8 oz flywheel, but since kg-cm^2 is a unit of rotational inertia and oz is a unit of mass, there is no way to directly convert one to the other. I am assuming flywheels that use ounces to designate their inertia are actually oz-in^2. Does anyone kwow if this is correct?