Hello everyone, I was hoping you might be able to help me out with an issue I'm having with my Rad Mini 4. I've been riding it pretty hard for about 4 years now (honestly way harder than it was probably designed for). Recently I've noticed that the bike seems to have lost a lot of its power in assisting me. Hills where I didn't have to pedal at all before, I now have to pedal hard with it on max assist. I run multiple batteries with it and the power loss is consistent regardless of which battery I have in. So here are my questions:
1. Is there a way to test my current motor with a multimeter and if so, what should the readings be if the motor is in good running condition?
2. From the research I've done, it appears Rad does not have a true 750 Watt Motor. If I buy a true 750 Watt Motor, will my stock controller be able to work with it or will I need to also replace the controller?
3. Will a non Rad true 750 Watt Motor come with plug and play Rad Bike Connections or will I need to cut the connector off the old motor and wire it in?
4. Where is the best place to purchase a new motor? Rad wanted $395.00 for a complete new rear wheel and motor and doesn't sell the motor separately.

I appreciate any help you can offer me. I'm definitely not opposed to modifications that could get me a little more power out there too. Thank you in advance for your help.