Rear Hub Motor Noise Problem


New Member
I am having a problem with noise and friction coming from my China 1,000 Watt 48 Volt rear hub motor.

It has 1,500 miles on it.

This is the sound that it makes:

I placed the hub motor in a vice with cogs down and the motor spun silently and smoothly.

Upturned with the cogs up and I spin the cogs. My guess is that the freewheel is making the noise.

A few weeks ago, I had a similar noise and resistance to rotation and a squirt of WD-40 onto the cogs, etc. and it silenced it.

My best guess is that the the freewheel is the culprit.

Where can I buy a replacemet freewheel with 11 teeth and a socket wrench to fit to remove it?

All help would be appreciated.

George S.

Well-Known Member
Single speed, right? Doesn't seem to exist. Lots of 7 speed with an 11T.

(Link Removed - No Longer Exists)

Thomas Jaszewski

Well-Known Member
Throw the WD away. It's a solvent not a lubricant. There's a number of good lubricants developed for bikes. Seriously. WD isn't one of them. There are single speed freewheels. I'm using a 22T and a 14T on a couple of builds. BUT it may take an adapter or spacers to correct the chain line.


Well-Known Member
Freewheels are problematic under the best of circumstances.
The ones I've seen all seem much cheaper (made) than cassettes.
if that's chinese freewheel on a chinese hub I'm not surprised at 1,500
They tend to "lock" onto the hub as well. Be careful removing.