Cassette shaking when motor spinning normal?

[eecsflyer]

I just installed a Crystalyte hub motor in a prelaced wheel from Grin tech on my handcycle. When I let the motor spin the wheel while the wheel is in the air and I am off the bike, the cassette oscillates side to side. It is subtle, but you can see it in this video

https://youtu.be/48pe9ilTm4E

Is this normal? Should I be worried?

 

[kcuf]

to be expected

 

[Electric Earth]

Hmm... Whether or not it's normal for Those motors, I don't know, but I wouldn't be OK with it. I've been a cyclist my whole life, and I've never had that before, including on the couple cheapo hubmotors I've dealt with since getting into ebikes. I would very much think it's going decrease shifting consistency, likely cause premature cassette wear, and perhaps chain wear.

 

[eecsflyer]

to be expected

Is this something that goes away with use? Do you know why this happens?

 

[MadRhino]

I was going to say no it is not normal, but then I saw it is a Clyte H35...

 

[MadRhino]

Seriously...
Even though brand new Clyte H35 often are out of true, it is not proven yet that it is the origin of your ´problem’. It could be the cheap freewheel itself. Also, freewheels often have a lateral play, and could be moving in and out slightly when the wheel is spinning off the ground, in reaction to a wheel lacing out of true, or a tire mounted with the bead that is not perfectly aligned. Don’t worry much about that. Freewheels never last a lot of mileage on motors anyway, unless you buy expansive ones.