I had the same noise. I pulled my cover and found my idler gear had come loose. My washer and C clip went through my clutch gears and did some ugly things.
Well I guess maybe I'll rip it apart if you guys a serious you think it's the crank. Freaking Chinese cranks that were supposed to be just as good as a hot rods. I guess the wang crank i got lasted like 7 years so i should be lucky.
I hear this weird sound coming from what I think is the flywheel side. No movement in the crank and the seal looks good.
https://youtube.com/shorts/o25XPsmot9A?feature=share
Well I have a new on on the way so we shall see. I'm putting my new vf3 petals on first. If that dont fix it I'm adding the new (expensive af) stator on. If that dont help I'm going to cry. I'll ship it to Jersey and let john part it.