Yes, I have a Yamaha ydx moro and have the problem right now. In my case Im waiting for Yamaha to fix it under warranty. I concluded it happens when hitting harder bumps, causing some movement in the battery connection with the controller. I took the battery out and tightened everything up and went on a 7 mile ride on the street without issues. I then took it out on my usual mtb route and had shutdowns again.
This part for my Yamaha bike is a different part # and is available. I don't think you are correct that a new motor is the only solution, at least for my bike. Same Pw-×2 motor as OP.If it’s the controller assembly inside the motor you cannot buy it. Replace entire motor only. There is a three year warranty at least.
Here is the controller board you can see the part number right on it. When checked it doesn’t come up anywhere so a new motor is the only solution. Good luck
View attachment 86517
I took your suggestion but used some 5mm dense rubber. I went out yesterday and purposly took a very rocky route and no problems! On my Yamaha there were a couple of thin hard rubber strips on the inside of the battery cover already but they were too hard, maybe hardened and worn out? What I did seems to have re secured the battery, preventing the battery movement in the DC recepticle. So on my bike its seems the problem is the DC recepticle as shown in post #2 above. Its only a $55 part thankfully.
I dont know, the Yamaha parts catalog for my bike shows X1V 86212 41. I think that number is a mistake, when shopping I found the controller with the first three digits as X1M. Youre right, confusing.
The part that starts with X1M is available, youre right that X1V isn't, my mistake. I think the X1M is the right part. Im not the guy with the 2nd motor. In my case I think the problem is the DC recepticle, as mentioned above. If I cant get Yamaha to send me one under warranty without any hassle Ill just buy it.
Do you remove the battery and clean the interface between every ride? I still have error code 71 shutdowns, they are very random. I can go a whole ride without any issues but the next ride I may have ten shutdowns. The few times I did clean the interface it seemed to help solve the problem but only temporarily. I dont know whether to credit the parts cleaner or not.
My problem was solved by Yamaha with a warranty claim. All they ended up having to do is apply Dielectric grease to the connections between the battery and motor. That procedure is what they wanted to try first and it worked; havent had another shutdown since.
