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.
do you know what's different about a 20" bafang hub motor vs. a 26"? are the planatery gears different or do they just go slower due to wheel size? I'm only on my 4th ebike, wanting to do something radical w schwinn i put a 500w on front.... thinking about running dual motors with one gear'd higher(overdrive when the rear is spun out)), that 20" 750w upgrade I see going in those fat wheels looks just like mine🤔
@@autojohn-pu1vf The winding can be done differently in manufacturing to affect the torque and top speed characteristics. so likely a 26" motor/wheel assy will be wound a bit differently - you can decipher these with the motor codes stamped on the motor. sorry i cant give you specifics... but in essence you need to do your homework on which motor and with what winding, not just wheel size.
That washer does cause noise I have a bafang motor and was driven crazy by noise I accidentally forgot to put that ring back and boom the noise was gone.
Side note: it's amazing how many more motor teardown video's hit TH-cam since I put this out. I'm so glad there is more info available now. It's good for everyone.
I know this video is 2 years old, but I had the same problem recently. My rear wheels axle was bent by just a little, and it caused the motor to hit the magnet and cause damage. Everything else in the rear wheel was perfect. I wish they sold replacement axles for ebikes or reinforced axles. I usually buy reinforced axles for my normal bicycles.
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.
No it won't. The gears are plastic/nylon. If the bearing seizes the plastic teeth will just eat itself and that's it. It's not going to ruin the shaft. You're trying to apply automotive knowledge to cheap plastic planetary gears made in china.
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.
@@steveshea7725 So, I assume you'd come get me if they do shred? I just can't take the chance as I have no way to get my bike home otherwise as it doesn't fit in our cars.
@@guitartec Yeah mine shredded new heybike explore in less than 200miles from new and I had a trailer I could haul it back home at least I had my wife with me so I took her heybike ranger to get the trailer or I'd been screwed.. You can't even pedal when the gears go or push because the wheel was locked...
@@22YZ450FX They sell brass planetary gears now. I never did instal the steel gears I have just b/c everyone says the nylon gets noisy as the teeth break, so you can probably get to where you're going before complete failure.
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
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.
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.
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?
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.
Thanks for posting this I just bought 10 bikes with this motor...good to know its serviceable.
do you know what's different about a 20" bafang hub motor vs. a 26"? are the planatery gears different or do they just go slower due to wheel size? I'm only on my 4th ebike, wanting to do something radical w schwinn i put a 500w on front.... thinking about running dual motors with one gear'd higher(overdrive when the rear is spun out)), that 20" 750w upgrade I see going in those fat wheels looks just like mine🤔
@@autojohn-pu1vf The winding can be done differently in manufacturing to affect the torque and top speed characteristics. so likely a 26" motor/wheel assy will be wound a bit differently - you can decipher these with the motor codes stamped on the motor. sorry i cant give you specifics...
but in essence you need to do your homework on which motor and with what winding, not just wheel size.
@@rickc2222 I figured there was something like that, TY👍
That washer does cause noise I have a bafang motor and was driven crazy by noise I accidentally forgot to put that ring back and boom the noise was gone.
Definitely dont toss that washer, its a plain thrust bearing, its there to protect the motor from any side-side force
Side note: it's amazing how many more motor teardown video's hit TH-cam since I put this out. I'm so glad there is more info available now. It's good for everyone.
I know this video is 2 years old, but I had the same problem recently. My rear wheels axle was bent by just a little, and it caused the motor to hit the magnet and cause damage. Everything else in the rear wheel was perfect. I wish they sold replacement axles for ebikes or reinforced axles. I usually buy reinforced axles for my normal bicycles.
@@Just_Randomi Just saw this. Thanks for adding to the info!
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.
No it won't. The gears are plastic/nylon. If the bearing seizes the plastic teeth will just eat itself and that's it. It's not going to ruin the shaft.
You're trying to apply automotive knowledge to cheap plastic planetary gears made in china.
3:58 try greasing planetary gears
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.
They're not gonna shred like that you will have warning
@@steveshea7725 So, I assume you'd come get me if they do shred? I just can't take the chance as I have no way to get my bike home otherwise as it doesn't fit in our cars.
@@guitartec Yeah mine shredded new heybike explore in less than 200miles from new and I had a trailer I could haul it back home at least I had my wife with me so I took her heybike ranger to get the trailer or I'd been screwed.. You can't even pedal when the gears go or push because the wheel was locked...
@@22YZ450FX They sell brass planetary gears now. I never did instal the steel gears I have just b/c everyone says the nylon gets noisy as the teeth break, so you can probably get to where you're going before complete failure.
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
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.
what size and thickness is the thrust bearing washer btwn gear and hub at 0:44? Did you ever figure out the reason to the rattling sound?
What if we cover the gears with excess grease to eliminate resonance?
I wonder if a 1000W motor will fit in that hub.
5:27 "What's that clickin' noise?" Thanks for posting! Did the new bearings cancel the noise?
i took this motor apart exhausted and literally forget how the two lockrings go on. lol
Cellphone photos are your friend, and laying out parts in order of removal.
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.
The brake disc holes should go right into the the motor. You can see them in the thumbnail for this video.
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?
Do you have a link to purchase these gears , thanks
Do the Motors always come out the gear side not the side where the brake disc is
Couldn't they drive the outer black shell directly, instead of going through the planetary gears? 🤔
I have. Same noise problem on my. Scrambler juiced bike please. Help
@4:46 what type of grease/lube would you use on planetary gears?
In this case it’s a white lithium grease suited for the plastic gears.
@@bjackson1975 thank you
Clean all the old grease out with a rag and grease with full synthetic aviation grease that's safe for nylon.
@@steveshea7725 thanks, I hear Mobil 28 or molykote 44
Did you solve the clicking
Any resolution to the noise after replacing the gears?
Grease with high consistent
Change the bearings of the gears.
I have them just need to put them in.
What’s the best grease and brand to use? White lithium? Thanks
That’s what everybody’s using. A thick white lithium trailer hitch grease might be a decent option as well.
Full.synthetic nylon safe aviation grease
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
gear or clutch...
It sounds like the clutch
🎯 the Spragg is bad.
Where the grease, replace the gears and clean big metal gear and put in blue aviation grease, your gears will love you.
There's barely any grease in there
Still waiting on my Friend bike
It’s a great bike I don’t regret buying it at all.
@@bjackson1975 I order it last month after doing a ton of research with the bigger extra battery but looks like I will have to wait another month
Replace the gears with steel. You also need grease for the gears to clear the clicking sound.
the key is not magnetic..
You’re correct but too late to change the video. Felt like it when I popped it out, but realized later.
grease the hell out of it and stick it back together
Motore fuse short
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
All hub motors use nylon gears and thats totally fine.
I'm upgrading mine to steel gears.
Yeah but i meant given the price they should've been made in steel in the factory