EMAX Electric Hub questions

The e-max hub motor is a mystery. There are no markings on the motor that indicate who manufactured it, and with GGC/e-max out of business, no information will be forthcoming. Nor was there when they WERE in business. It's going to take some research (maybe via one of those wholesale trade web-sites) to determine the (probably Chinese) outfit who manufactures it.

The 2000 watt rating is probably the "continuous-duty" rating - what it can run at indefinitely at some standard temperature. It can produce a lot more power than that for short periods if allowed to cool down. The 70 amp advertized controller output would mean a maximum of 3360 watts. My speed measurements for various hill slopes and estimated air drag yields about 2.6 kw of rubber-to-road power in the stock setup, and about 3.5kw in the tampered shunt configuration.

Since I am in the middle of experimenting with increasing the amps to the motor, I am keen as to what the motor can handle, but the controller components or the not-so strong axle/rear forks attachment are probably the governing factor.

No, those are brushed EVT motors. Note that they are drilled and tapped for a disc brake. If the e-max motor gives out, you may need to use them - but this would involve also buying a complete disc brake setup plus a brush-type controller.

Come to think of it, the Kasea scooters (also being sold as teh zap scooter) use the e-max motor, and controller.