Rad Mini 4 Mod Help

[Fretzca]

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.

[Altema]

Hey! Sorry for the delay. I did reply to your private message, but I'll put it here since there's some additional info in your post.

1. I do have several aftermarket motors, but I don't have my original Rad motor, so I would not be able to give you an accurate resistance number. You can check to see if all three phases are working though, by disconnecting the main motor plug, and shorting two of the phase connections with a jumper clip or some other method. Feel how the wheel feels turning backwards, and when you short two of the phase wires together, the motor will be more difficult to turn and feel "notchy". Turning the wheel forward won't work because of the clutch, and when you do turn it backwards, watch out for the pedals.

2. The whole "true 750" story is a long one, but the Rad motor IS a 750 watt motor, and will handle peaks of 1741 watts. A lot of it is marketing spiel. That being said, the "upgrade" motor is a decent one, and should plug directly into your stock controller. A direct link to the motor is here: https://area13ebikes.com/products/bafang-fat-bike-hub-motor

3. The upgrade motor will come with the correct connector, according to my experience and the current photos on their website. But, double check with them to make sure.

4. Area 13 is where I got mine (all four of them!), and the current price is $229.99. You will need the freewheel removal tool, or a new freewheel.

A little more power? (Me grinning mischievously). They also sell a 35 amp controller kit which was plug and play for me, although one of the cables was a little short. This controller should work with a stock Rad motor and the upgrade motor. If I recall correctly, the speed I obtained was 23 mph with the stock motor, and about 27 with the upgrade motor. Area 13 has a new version of their upgrade motor, and the number of windings will change the RPM per volt rating, so your mileage, er, velocity mar vary.