***The drive plate mod was ONLY made at the center spacer (lip in the middle), so the belt was riding higher on the pulley initially, which lowers the rpms of the motor compared to the rear pulley at low gear (essentially a slightly taller 1st gear). The reason for the mod is to get a higher top-speed (35mph vs 30mph on a MET II running a MET I variator in this case)
The modified drive face runs in red show that the motor has a lower rpm when the clutch springs begin to engage, in the step from 0-2.5 seconds at the left. The engagement point is about 5-10% lower in rpms. Note that the stiffer-than-stock Blue clutch springs are used in both of these setups.