TSDZ8 mounting issue

[E-HP]

When I first installed my TSDZ8, I noticed some clunking sounds and possible movement when apply throttle or pedal assist, and cutting the power. Part of the sound was due to the clutch, but the movement was a mystery. I could actually feel sort of lateral shift of the bike. The motor felt tight without movement, and going through the whole bike, checking wheel bearing and swingarm for play, etc. I noticed a very small alignment issue with my rear wheel, that loosening the derailleur hanger a bit, and wheel was perfectly aligned, but didn't help the issue. I was getting to the point of just accepting that it might be normal when I did another check after riding yesterday, and now found the motor to be loose, allowing it to move when going on and off power.

My question is whether there are other mods to secure the motor better. The fit between the inside of the bottom bracket shell isn't tight, so it seems like the only thing keeping the motor from moving is how tight the locking nuts are, so I'm trying to come up with something that doesn't only rely on that. I was thinking about securing the motor with some industrial strength zip ties, so eliminate any rotational movement that could loosen the mounting rings, or possibly adding some shims between the motor and inner bottom bracket shell to provide some physical support so the locking nuts aren't doing all of the work to hold the motor in place. Any tips folks can share?

 

[dameri]

My motor get loose after first drive after installation. I Tighten nuts again and after that motor has not get loosen anymore.

 

[E-HP]

I tightened down the motor, and put two 3/8" zip ties around two sides of the motor, and a 1/2" zip ties tying them to the frame, so there's no movement if I push down on the motor. The movement while riding is completely gone; better than the first ride after installing the kit. The other thing it resolved, that I didn't mention, is when accelerating with throttle only, it would hit a certain RPM that make the motor vibrate/shudder, then would smooth out right after passing that RPM. The shudder is gone, or barely noticeable now (I can only sort of feel it, but probably wouldn't have noticed if it was always like it is now. So two issues that I thought I was going to have to live with are now resolved!