Shimano EP8 Motor Rattle

Hey,

Does anyone have a Shimano EP8 eBike motor, and have the rattle?

Have you found a fix for it?

Cheers!

Ricks

Probably won’t help you much but Nico Voulloz took his apart and did all sorts of things to quieten his down.
There’s a Pink Bike article (I think on it from a while ago).

The Shimano rattle is a known thing that everyone seems to complain about (same as their wandering bite point) but Shimano have never admitted to it being a problem. I found it annoying on the one I had a go on.

Yes. Yes. No.

I had a demo on one yesterday.

TBH by the end of the ride I’d already zoned the noise out.

There is no ‘fix’ because it’s not broken. I don’t notice mine really anymore.

There is no ‘fix’ because it’s not broken.

Hmm. I’d argue anything that’s rattling is broken. It may be designed like that, but that’s a broken design.

Considering we do things like put chainslap protection on, and foam on the inside of tubes for internal cables, and cable clips to stop rattles – it’s a pretty stupid design to build IN a rattle.

The rattle is apparently the clutch inside the motor. I don’t even notice it on mine

Perfectly normal. Bosch motors do it as well. The tolerances in the motor have to be a little slacker than they would in an automotive one due to the lack of power. I quite like my ep8 rattle now.

I quite like my ep8 rattle now.

In a Hope / CK hub kind of way? When I replaced my Pro2 hubs for DT 240s I really didn’t like it, it felt like I was riding chainless and couldn’t judge my speed as well!

Mine sounds like a bag of spanner’s being thrown down the stairs but it seems to be a trait of them so it’s become a case of living with it.

If you watch Rob rides videos he does comparisons and all motors have some form of clutch rattle
Some worse than others

The tolerances in the motor have to be a little slacker than they would in an automotive one due to the lack of power. I quite like my ep8 rattle now.

I think that was roughly the way it was described when the motors were released, there is  a certain amount of “give” in order to reduce resistance compared to previous offerings, and that is what creates the rattle.