Make your Bafang Mid-Drive Last Longer - BBS02 & BBSHD 

There is an argument that the entire assembly should have been cleaned and dried before adding new grease. A little messy, but all of the wear particles will continue to wear the components, even with new grease.

Just finished on the BBS02. Pretty easy and straightforward. Thanks for the video..

Thanks for taking the time to produce the video. Excellent. Newbie at bike maintenance. Just like to share the most important part about this whole procedure I learnt. Look carefully at the Crank Puller that you will use. I did not realease it has two parts to it. Make sure you match the size of puller end to mate with the face of crank shaft. I had to modify the small end to make mine fit. Initially, nearly destroyed the crank arm. I've just done 1000km on the bike. There wasn't much grease inside the motor. After following your directions and test riding. Results.....wow, now as smooth as silk. Highly recommend doing it. I also used Mobil grease 28. Expensive, but worth every bit.

very helpful, thank you! there is barely any grease in the gears from the factory, so i would personally advise anyone to just go ahead and follow the instructions in this video regardless of how many miles youve put on the motor.

Perfect clear video! Thank you!

Thanks, Excellent I wondered about this I would add clean first before lubing.

Good job, I'll give it a go sooner rather than later 👍👍👌👌👌

Very much appreciated, saved me from spending €30 on maintenance

It’s always interesting to see how are made the motors and how it’s easy to do the maintenance!

Thanks, I have one, and some time will have to open it up, so now I know. We call the Clutch a Sprag clutch in the UK, bit like a one way bearing, also called a sprag bearing.

last week i bought a bbs02 and fitted i did 50ish miles and its been noisy so i opened up to add some grease and there was only a tiny bit and found a tiny metal shaving i just packed it like in your video and its quiet now thanks for saving my motor

Very good info,that helped me out heeps good work cheers.

very helpful for your customers, thank you

Excellent video and well narrated. One constructive comment though...I found it unnecessary to remove the crank on the Bafang BBS01. Simply remove the pedal, then undo the crank ring, slide it over the crank arm to remove, the same for the motor cover. This leaves the gearing exposed for regreasing as you described. Reverse the process to complete the task 👍

Just bought a new BBS02 motor as a backup to the one I've been using for a couple of years. After seeing some of the videos about greasing the motor, I decided to take a look at the situation with the new one. Next to NO grease on the gears! Couldn't see ANY on the meshing surfaces! Greased it thoroughly and will have a look at it again in 1K miles. No doubt greasing it when brand new will help it last a long time.

i would use a lighter weight grease on the clutch in cold temps that grease may not allow the pawls to release good and may break pawls etc had it happen on rear hubs with similier configurations

thats why im a fan of bafang.

When I did this the motor cover was stuck on to the casing so that I had to pry it apart, then a couple inches of the gasket stuck to the cover the rest to the casing, and it tore at one spot. I applied the grease then I had difficulty getting the cover back on until I rotated the inner gear (ratchet ring ?). So now I guess I'll have to order a gasket and tear into it again.

What's your opinion on marine grease?

In EU it's hard to get Mobile 28, what are the alternatives?

Thanks great video iam 8000klm but no noise at all i should soon do this i noticed you have to line up clutch then spin clockwise then all re seat the next part seems a simple process for a beginner thanks for the video

I cant find any aircraft grade grease where i live and importing it is costly 50$+ .... any cheaper alternatives?

Do we need to do this on the 500W version? Thanks

has anyone taken the axle apart to replace the clutch? I've take the snap ring off and everything I can find to remove, but the axle won't slide out from the gear.

what Penrite High Temperature Wheel Bearing Grease 450g Cartridge is good?

I used Mobile 28 about two years ago and never looked back. Still going strong. My tires make more noise. I’m in the process of doing it again.

Did my bbshd greasing from brand new, running really quiet too! ..its quieter than my bafang 500w hub drive, but guess you can't make the hubs as quiet anyway?

Allow me to add to the chorus of commentators pointing out that you should always remove every possible speck of old lubricant before adding new. If you are going to do it, do it right.

I think it important to do this level maintenance at the beginning of the motor's life because you can never guarantee how much lubrication you have at the start.

Was there no grease from stock

very nice teardown very informative I would just edit out every screw install you only need to show one or just speed it up.

Petroleum base grease is not recommended for nylon gears at all it makes them soft causing more harm than good! Silicon grease is recommended plus it also has the advantage of being dielectric (none conductive) so its save to use around electronic's like the printed circuit board inside there.

Great video, thanks for posting in. Just received the Juggernaut Ultra FS Pro. Is this procedure in the video the same for the Bafang M620 on the Juggernaut Ultra FS Pro? Thanks in advance!

Hello, what do you use for grease? And you put it on every how many miles? Thank you

I don't get the obsession with so much grease....... over greasing can cause extra friction, loss of power and heat build up. grease is a substitute solution where oil can't be used or easily contained. A good quality grease should be used that matches the material of the gears .....Clean out the old grease before packing with new stuff ......it task is to provide cushioning as well as lubrication. IMHO.

Any guides on M800 motor?

I’ve just purchased this BBS HD and installed it and wrote it for 200 miles, the issue I’m having is the motor will provide too much resistance or something is to my peddling so anything under three speed on nine speed mode it’s like paddling against the current or as if the brakes were on. I know it’s nothing to do with the wait because for some reason when the motor has been off for a night or a long time and you initially try to pedal without turning the motor on there is no or little resistance it’s only after activating the motor and paddling for a moment that something engages inside which starts the resistance again. Of course the motor works and rolls you up the hill good but the problem is it’s like there is the brakes on all the time which I think can cause extra lots of battery to lose as well as it’s near impossible to go anywhere when the motor is off or in low PAS. I am hoping somebody knows any solution to this I’ve read maybe I have tightened the motor too much as a lot of people recommended it can loosen but also maybe the nylon gear has already went out or they’re just needs to be way more grease inside any help would be appreciated I have not looked inside yet but just disassembled everything

Thank you for sharing!

Hmm you used mobil 1 synthetic grease while the recommended is mobilgrease 28. Also only greased half the gears in the motor and no mention of removing the old grease from the gears which will contaminate the new grease. I'll be doing this as soon as the grease and replacement reduction gear turns up but to the entire motor.

Where can I get Mobil 1 Synthetic Grease in Canada?

Possible Mobil 1 Fully Synthetic Grease?

Helpful ta

Hi! A little question: what would it do, like, at -20˚C in winter? Grease would hardened a little bit? If so, is it going to drain the battery a little faster?

hello i have bbs02 750 that work and stop and then work can you advise me what wrong and how to fix it, thanks

What frame is that fat bike? please and thank you.

Good video! But the step to get the BBS02 shaft out is missing, it is not just to pull it out as it seems in the video :) you have to remove other side crank and those nuts there.

So the jauggernaut ultra 1000 has a different mid drive motor? What is it called. I have the 2019 model

And the 2 sets of bearings on the crankshaft itself? I pull the shaft , and grease the 2 sets of trust and roller bearings too.

Is there an alternative to use instead of Mobil 1 as I’m in London and we don’t have that unless I pay for shipping from USA 🤪

is it the same process for the bafang ultra?

do i have to remove the battery compltetly, isnt it enough to just switch the battery off at the rear?

Hi, great video. Just bought my 1st Bafang BBS202B - Should I grease it up before I install and use, or after a while?

Great video but I'm unable to purchase the grease in the UK. What other options of Grease please?

I'm experiencing a clicking noise with my motor and it only has 300km on it. I'm not sure what the issue is but it sounds like a bearing inside the motor case. Seems odd to me these motors are not prepared for use from the factory or retailer... My bike did not come with any instructions, let alone any recommending opening up the motor to grease it... I love my bike but these are some pretty annoying problems to be having on a brand new bike...

How often you do this ?

Once you have it apart, what do you think about adding a grease fitting?

WHat is noises are coming from the bottom bracket?

Is there a pattern for the bolts?. Is there torque lbs?. If I find it I'll post it, unless you already know.

where can i find a frame like this?

Can this be done with the Ultra as well?

nice video thanks. any tips on making the controller last longer? My bbs02b has had two controllers fail both around 400km's. So 800km in and Im already on third controller..

can i also use a different grease? because this one is not available in my country

I previously bought molygrease. Will this be just as good?

What do you use to pull the Crank arm off? Where can I find it? Is it specific to Bafang? Thank you

If I should add grease to my Bafang BBS02 when there's 1000KM on it, does that mean I have to add grease every 10 - 12 days? Because I commute with my bike about 100 kilometers a day. Like, that doesn't sound right. Can anyone please enlighten me on this matter? Thanks.

what is the usual going rate for this service at a shop ? seems like it takes about 20 mins or less

I greased my new BBS03 with aersohell grease 22. Before adding new grease, I removed the old black grease.

Bugger. Started on my one but it's nothing like that one of yours. Haha. Not sure what motor I've got now. It's a Bafang in frame one.

Mobil SHC100 is a better suited grease for this application, and I believe it is cheaper too! :D

That’s a very solid custom frame! What are the details?

What other grease we can use instead of using mobil 1, mobil 28, aeroshell 22 greases, since these greases are hard to find and expensive in my country, and these aero type greases seems like an over kill for this type of motor

I have done 1800km on my BBS02. I don't think there is any noise. Should I do this now or wait for noise?

Why you didn't put grease at nylon gear? 🤔

hey BBS02 users, what mileage did you make? and how does it work now? I made 3000km and it runs like a new one (no regreasing so far)

On my BBSHD motors, when you remove the cover the gearwheel comes with it and I can´t pry it apart to get to the clutch. Is there a trick?

👍🏻

I live here in Seminole Texas and I received a juggernaut and it needs to be oiled can I take it to a shop somewhere do you know here close to Seminole?

i must redo mine

Not much really to do on the bbs02, can't grease the clutch

The unit already is delivered properly greased. There is no need to do this- also the reassembly of the cover is very exacting. If not exactly aligned you risk cross threading the screws- then you're really screwed...

This is only 1/2 of the job, you definitely have to clean out the old contaminated grease then remove the crankshaft and lubricate the "Needle Bearings" they have very little grease from factory and they are often near dry or starting to rust @ 1500 miles. Not greasing the drive system in its entirety is the #1 cause of BBS02 motor failure, a very expensive mistake.

I personally would have wiped as much of the old grease off as I could, didn't seem like you wiped off any at all.

there is a benefit of removing the old dirty grease first.

Thought a torque wrench would be used at some point, there must be torque settings for those bolts

I will say this, the main gear doesn't come off like that, especially after extensive use, you need to tap it out carefully.

I bet this should be done when the bike is new. The grease they use in the factory prob isnt very high quality.

The only "Grease" that won't deteriorate the nylon gears is: Black (not grey or white that have different components) Black MOLY GREASE NGLI 2 w/Lithium (thickness) Applied to the metal reduction gears... Reapply after 2k miles or anytime you begin to hear the motor spinning louder. Many have used other greases that break down the nylon gears and cause more problems.. Select the correct one.

you should clean as much of the old grease and grim off before putting new grease on

It dont need that much at all . The centerfugall spin will make the grease fly out onto the case . I greased mine but not as much .

Y'all missed a Step: Step #1 - Order a NEW Gasket for the cover and have it on hand prior to disasembly. Factory gaskets will more often than not tear to pieces the first time the cover is removed. Any gaps between the cover and case WILL leak grease. Side note: You really only need to lubricate the main output gear. Excess will transfer to the drive pinion. A better alternative to the Mobil 1 is Lucas "Red-n-Tacky". It'll stay stuck to the gears longer and resist flinging off on the inside of the case. All this tips I've given are from maintaining 3 BBSHD powered Bikes.

Should just take the cover off when new and grease it I’m sure they don’t use enough

Grease the bearings too.

Grease nipple?

You need to regrease the nylon gear as its done badly from factory

mine lasted 20 km

Why is my bb2 750w grting 🔥 hot

So no cleaning, just shove more grease in it?? How about the primary drive gear and clutch bearing (sprag)?? Seems like a waste of time and grease w/o any cleaning or completing the job.

They used WAYYYY too much grease. It only needs to be lightly applied and only after the gears have been cleaned beforehand. They didn't even clean the old contaminated grease off of the cover. When they took it apart note how much grease was on the cover? After greasing your bike as they show and after using your bike for a month or so pull the cover again and see the mess left behind from the excess grease! It has no place to go and after awhile it will force itself into everywhere, even places it isn't supposed to go.

decent vid, probably could been half this length.

These engine don't need grease below 25000km we sold many of them the grease can't dissappear there only little is needed not so much like this video