Motor crunching sound

[Pineman]

My motor makes a horrible crunching sound when starting from a dead stop facing uphill. Sometimes it shuts the bike off and will not restart until I disconnect and reconnect the battery.

 

[CloneWerks]

make, model, brand, age, mid drive, hub motor,..... come on you gotta give us something to work with

 

[punxatawneyjoe]

I'm going to go ahead and just guess at it. It's probably a hub motor around 750w and i'm assuming the nylon gears inside the hub are broken/stripped/worn and skipping/binding under a load.

 

[Pineman]

make, model, brand, age, mid drive, hub motor,..... come on you gotta give us something to work with

I purchased the Magicycle bike in April 2022. Probably as less than 300 miles on it. I was on another E-bike site and all indications are it has nothing to do with the bikes make, model or hub motor type/manufacturer. Several people indicated that it sounds like a hall sensor wiring issue. The problem only occurs when the bike is pointed up hill from a dead stop. It seem to occur more when using the throttle in lieu of pedal assist.

 

[Pineman]

I'm going to go ahead and just guess at it. It's probably a hub motor around 750w and i'm assuming the nylon gears inside the hub are broken/stripped/worn and skipping/binding under a load.

Thanks. It is still under warranty. I will take it in for service and post what the problem was.

 

[punxatawneyjoe]

That would be great, this forum has been very helpful to me and others. The more info we can get out there the better off we all are helping others.