Great
The programming software helped. Original motor output 22Vdc maximum voltage changed to 36Vdc. The former gps measured at 12km/h turned into a speed of 20km/h. Speed measured on a ride with a load of 36V 70Ah lead-acid battery and a 100kg man. And the engine doesn't even overheat. Towards the end of the week, 4.10/3.50-5 tires will be replaced with larger electric wheelchair tires. They have the same 20mm shaft.
When the maximum voltage of the motors was increased, the low battery indicator light also seemed to rise for the battery. It seemed that with the 30-40Vdc setting of the motor, the low battery indicator flashes at approx. 35Vdc battery voltage.