Attached MP3 21 second clip ( https://www.dropbox.com/s/o9p8yu135qyhy59/Allant 9.9S Motor Grinding.mp3?dl=0 )
Getting worse day by day
700 miles on new bike
Here we go.....again!
Was thinking similarly. Seems less likely that it is the motor and more likely coming from something else. But eager to find out for sure.To me it sounds like it's coming from the external mechanicals or some other structural component not inside the motor.
The tolerances within the motor are extremely tight. Since it is rhythmic, it might be related to the crank arm motion and its interaction with structural components.
some perspective. I own four other bikes with Bosch motors, 2 gen 2 CX and 2 Gen 2 Speed. Between the four of them there is almost 17,000 miles of riding on them. None have ever had any motor, battery or display issues. All Bosch component have been trouble free. This is my first potential Bosch issue in that many miles. So I am willing to give them so latitude, so long as they fix the noise. Don't care how they do it, just fix it and do so promptly.I checked in with my LBS yesterday, and they too also informed me that nothing is happening until the start of the work week.
My curiosity and concerns are like, really? New Generation 4 motor, and NOW, these types of issues are happening? I really, really, really, feel like maybe we are beta testers and the product may have been released too soon.
Just like the 1st year production of a car as an example, I should have been the wiser.
In any event, I got my previously owned Super Commuter back as a loaner (that has 1200 miles on the 2nd motor that was replaced after 5,000+ miles the LBS has it sitting in their store room), Trek never asked for it back, who knows why or what), but in any event, I put 25 miles on it today and it was a good feeling, albeit the occasional grumpy noises from the motor that initially created the reason for a replacement.
So, even the previous generation motor had issues, the new one too maybe....so what are the options, if any, a Yamaha motor bike, a Brose motor bike, or a no motor bike?