Any update on this repair yet. I have a 2018 rad rover and they said I need a motor replacement. My motor works fine it's just not registering speed. I only have 175 miles. I know how to get the motor apart and can solder just fine. Does anyone know what wire is the speed sensor?

I have a 2018 Rad City and this happens to me all the time. Today I finally added some blue locktite. I'm sick of fixing it. I have 575 miles and it's done it 3 times. The crank-set is loosening up. You need a special tool to take the crank arm off and tighten it. I bought this one and it did the trick. https://amzn.to/2WnbYdQ . It's really simple to fix. It will get progressively louder until you can feel play in the crank with your hands if you rock it by holding both pedals. My guess is when your guy tightened the crankset on yours it felt almost fully tight to him and when you rode it the problem more or less went away. It's doesn't need to loosen much to get play and to feel it.