What are the chances huh, opened today…
The motor circlip went open? and caused the rotor/shaft to move… 
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I am going to follow the golden rule on the other side.
It looks fine so I am going to leave it alone.
Just clean and grease…
No need for spacers any ways right… Also not mirrored…
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Twinsies
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Ok. I got it all back together and loctited…
Will let it sit a couple days…
Who wants to bet me the clicking is still there once I hop on it again???
Cause that is just my luck…
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see @Boardnamics
this is why straight cuts are better 
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It also happen to first set of my M1Street gear drive, both of my mortors got busted wave spring washer from axial load of helical teeth profile.
Need to made 0.7mm thick washers to sitting between c clip and motor bearing for my new set of motors and gear box.
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What’s the distance between the motor gear and the motor mount? And the gear box cover
Also what diameter is the gear?
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I’ve been telling him, i think maybe he’s starting to believe me 
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Did you mean sine or strain?
Are these flipsky motors?
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APS which is really Saite
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What does saite mean lol
Saite is the factory that makes the motors. Alien power systems used them.
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So basicly putting washers between the clip and the the gear on the shaft will prevent the clip from coming off. Seems like the first few washers would need a larger inside diameter sense it gets wider where the bearing and clip are.
This worked until the circlip jumped to the other side of the stepped shaft. So basically the circlip was a weak washer at that point.
Removed the circlip, just using stacked washers and loctite now and it holds up pretty well as long as I don’t crash it hard.
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The gears are 10mm thick, the gearbox housing is 17mm deep, and the gears sit 1mm off the motor mounts…which means 6mm of space to put a thrust washer
Thrust bearing, pair of washers for contact faces, and a spacer to keep the large gear from touching
No chance for the gear to push against the gearbox
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Wouldn’t have guessed that’s what you have to do, you have pictures? How come a sleeve on the motor shaft isn’t enough?
On the right side the acceleration forces the gear to the motor and you can use a 6mm M8 spacer to support the gear but it still puts force on the c-clip so you’d need an additional 4mm M10 spacer to put the load on the bearings instead
On the left side the acceleration forces the gear away from the motor so using a 6mm thrust bearing stack (1mm washer to protect the gearbox, 2mm thrust bearing to take the load, 1mm washer to push against the bearing, 2mm spacer to take up the gap) will load the gearbox instead of the motor
This is specific to the 10mm stepped to 8mm shaft BN motors
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I suggested this exact thing to @Boardnamics, he told me that getting the tolerances right so the gear case still closes would be very hard.
The obvious solution is straight cuts for max cheap and herringbone for max quiet, take side-loads out of the equation. Helical is an accident waiting to happen, unless someone wants to put in the effort to develop a better implementation.
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