Thanks for posting this I just bought 10 bikes with this motor...good to know its serviceable.

Interesting, I've greased up the gears because I was getting the same noise. Had an issue when I put it back though. I think I'm missing the washer you talked about

Where the grease, replace the gears and clean big metal gear and put in blue aviation grease, your gears will love you.

5:27 "What's that clickin' noise?" Thanks for posting! Did the new bearings cancel the noise?

Definitely dont toss that washer, its a plain thrust bearing, its there to protect the motor from any side-side force

Each gear has bearings, each bearing has needle rollers, in one of the bearings one or more needle roller has worn a flat spot on it, that's what's your hearing, if it seized, locks up, and it will sooner than later, then the race will turn around the shaft ruining the shaft so Right now it might only be the cost of the gear. It's usually the nylon teeth that wears out first.

What if we cover the gears with excess grease to eliminate resonance?

My ebike is noisy only sometimes, but other times not noisy... But if I let off the throttle and reapply some times it goes away, sometimes it very loud. I took it apart didn't see anything wrong. SO I ordered one way clutch and nylon gears, also ordered a tire and tube because it was bald and flat. I re-assembled the motor, just waiting on a new tire that should be here tomorrow. I hope this fixes it.

I have a bike with a bafang M155, it's a 750W motor. The motor is the opposite orientation where the cable comes out the brake side rather than the standard cassette side. To get the motor out I have to get the main planetary ring gear out of the hub. I've tried pullers with no success. How do you get that main ring gear out?

3:58 try greasing planetary gears

Replace the gears with steel. You also need grease for the gears to clear the clicking sound.

I wonder if a 1000W motor will fit in that hub.

All throughout my early days of r/c cars, we always upgraded the nylon gears to metal, regardless of the extra noise. We did this for reliability. We reassembled with good grease and the motors and transmissions were rock-solid and happy over several race seasons. This coming winter will be my 5th riding season on my Bafang 750 fat ebike motor and I'm going to replace the planetaries with metal gears that I already purchased last year. The whole point is that my 70 pound fat bike is not gonna get pushed home 20 miles because the planetary nylon gears failed like all the RC cars that we used to run. I'm not pushing that pig home! I know it will be noisier, but on my bike local path that may be a good thing. Also, you can get copper gears as well as steel. Not sure what the difference in sound or longevity is. If I'm successful, I'm going to put together kits along with the security bit in grease for the Bafang 060.

Following up on this. I haven't replace the gears yet. I have them just haven't put them in. Next couple weeks I should be able to do it and will to an update video. Thank you to all that responded and found the video helpful.

Couldn't they drive the outer black shell directly, instead of going through the planetary gears? 🤔

Side note: it's amazing how many more motor teardown video's hit KZfaq since I put this out. I'm so glad there is more info available now. It's good for everyone.

Did you solve the clicking

i took this motor apart exhausted and literally forget how the two lockrings go on. lol

I drill a small hole on the gear side so I can spray chain lube on the gears. I use a plastic rivet to cover the hole. If you do not have a pure sine wave controller. You will get a whine traveling through the motor.

Do you have a link to purchase these gears , thanks

I have. Same noise problem on my. Scrambler juiced bike please. Help

Any resolution to the noise after replacing the gears?

What’s the best grease and brand to use? White lithium? Thanks

@4:46 what type of grease/lube would you use on planetary gears?

There's barely any grease in there

gear or clutch...

Change the bearings of the gears.

it's very dry it Suppose to be Completly Saturated with Grease to protect the Teeth anything with moving parts should have lots of Grease

It sounds like the clutch

Still waiting on my Friend bike

Plastic?

the key is not magnetic..

Motore fuse short

grease the hell out of it and stick it back together

bafang one of the most expensive and planetary gears are in plastic ! wow now i m sure i ll never buy any of their products at all