The 1000 Watt motor is better off the line and will provide a higher top speed than the 750 Watt motor.
There are no 36 Volt motors that will mount directly on the original motors mounting holes without adjustment. Our MOT-36350 36 Volt 350 Watt motor will fit the original motor's mounting holes however its sprocket sticks out a little further than the original motor's sprocket does so the mounting holes would need to be filed or drilled to reposition the motor. The 750 Watt and 1000 Watt motors mounting bases are larger than the 250 Watt and 350 Watt motor's mounting bases so their mounting holes will not line up with the originals and new holes would need to be drilled or an adapter plate made.
If you are using the original controller then its motor connector will be plug-and-play with the 750 Watt and 1000 Watt motors.
Please let us know if we missed any question or if you have any new questions.
ESP Support is a team of people and not an individual. When you call you could ask for Jon at extension 100 as he is our most experienced support agent in regards to technical questions.
Those metal tips on the end of the motor wires are what we call terminals and they are necessary to connect the motor to the controller. Those terminals insert into a housing to form a connector which plugs into the controller.
What is needed to plug the motor into the controller is a terminal housing which looks like this.
The terminal housing that is on the original motor can be reused by extracting the terminals from it and then inserting the new motor's terminals back into it. There are locking tabs on the terminals which can be pushed in with a small precision flathead screwdriver to remove them from the housing.
If you are unable to extract the terminals from the housing then please let us know and we will send you a new terminal housing to complete the installation.
Please let us know if you have any questions.