AWESOME explanation.. electric motors are way more efficient at high rpm, a lot less mechanical wear, less heat produced in the controller, motor windings, battery... basically the whole system works better if you maintain the motor at high rpm by correctly shifting gears!! Love that raw footage.. more videos like that mate =]

I don't own an ebike, but have a friend who does. I sent this video to him and told him this info is essential BEFORE buying/ riding an ebike. In short, if you cant pedal the bike up a hill or into headwind in a high gear, don't expect the motor to do it. Thanks

Man! Amazing man haha ;) it’s like driving a standard car. You never start off in third or fourth gear. You always start in first gear and as the revs increase you change gears and you never drive around all the time in fourth gear. Great video makes perfect sense amazing 👍

You’re the first person that I’ve watched who has explained the exact effects of high torque on ebike motor gears. Thank you

Not only do I love your vids for their information, but I also love your quirky tangents about things like using the metric system vs our absurd "imperial" system..the fact that you are bilingual but can still write proper english, etc. Your passion is contagious... Keep on doing you..and thanks for the information.👍👍

This dudes' impressions remind me of riding my 2 stroke dirt bike.

Just like going to a good friend's workshop and him sharing his wisdom over beers. I really appreciate your engineering based explanation, but your obvious extensive experience actually means more. You can't change physics and your expertise is evident. A simpler way to explain it could be to simply turn off the motor. From a stop, use the highest gear and repeat for the lowest gear. You see how hard it is in the highest gear. Now imagine the difference on the motor. Just as the motor and gearing makes it easy to go fast, the wrong combination of power and gearing will put excessive load on the drive train and will break components including the motor. The weakest links will break first, but overall wear will be high. I really like your other videos where you show troubleshooting of the damage to the motors and explain how it happened.

This guy knows what he is talking about and explains it perfectly in his second language. Great video.

Excellent video, thanks for making it.

Great explanation!

Awesome explanation bro ... loved the graf, cheers from brazil. Btw: vai pra cima irmão, comecei a acompanhar agora, tô curtindo!

Outstanding and intuitive. Really liked the analogy and math example of 500watt high rev low torque and vice versa. Yes, we still use an outdated measuring system, but with time - that too will change. Metric and SI units will prevail.

Outstanding!

Thank you for imparting your knowledge 👍

Muy bueno. Gracias !

Thank you for the video, very informative! I paid for the motor so I'm keen to make it last as long as possible, so every tip helps. Keep up the great work!

Thank you man!

Good explanation. I just liked the irony a lot more. Keep having fun and spreading knowledge dude!

Thank you for another great video. Subscribed 👍

Thank you. You explain the physics of bike performance / physics better than anyone I've listened too. Keep making these videos please.

Thanks! This information is huge to me. You are a most excellent instructor for me. I can hear you very well. Your diagrams helped!!!

Thank you so much for posting this! I learned a great deal about torque and revolutions and how they relate to power. That explanation with my basic math skills was eye opening and will help me maintain a good working bafang motor. Wish I would’ve known this before, but fortunately I keep my motor greased and haven’t had any problems. I’ll be more conscientious about shifting gears now. Keep the information coming. You are a great help to this industry. Peace

I found this information very useful.

Dude, big thanks. Really good explanation. One of the best video I've seen on YT. There will always be haters. Don't pay attention to them. ✌️

Your passion demonstrates very high integrity for sharing this knowledge you have Gained by hands on proven experience and research of e-bike physics

Thank you know i understand 😊

Excellent explanation, I understand completely now. Thank you. :-)

Good job , operating the bike in a similar fashion to a standard transmission car is a good example on how the electric bike should be operated . Not only is this good for the electric motor but also the rest of the powertrain ,in particular the drive chain .

Thanks for your explanation on this issue, I did not know about this. I have a bike that I am looking to convert to a mid drive ebike, and I plan to pull a trailer behind it. I live in the mountains of California, and I want to make sure that it will be the best setup for my use. I'm glad I found your channel

Solid explanation, even better math! Keep up the good fight!

Well explained technical topic, and entertaining too lol. I am old enough to remember when we transitioned from using Imperial units to metric in Canada. I worked in Oil & Gas for 30+ years which due to being a US-centric market continued to use barrels, psi, etc, but being in Canada, we became adept at dealing in both Metric and Imperial out of necessity. The last mid-sized Canadian company I worked with was bought out by a Spanish company, Repsol. The worst part of the deal was that monthly statements had to be reported in Canadian $, US$, as well as Euro's. Lol

I just reviewed the short video where you explained why you don't like the shift sensor and the uphill scenario. It reminded me of the difference between driving a stick shift or manual vehicle vs an automatic. Manual is more fun and engaging as a driving experience. I grew up in a mixed farm and used to drive 18-wheelers so have shifted a few gears in my day. Lol

I made my first 200miles on a 20inch fatbike with a bbshd and a sturmey archer sk rk3... 52 v 37ah.. 46 lekki bling with 19 in the back.. 27mph top speed and climbing gr8t! I pray the IGH will hold up for a while.. Nice explanation Mate, very helpfull👌👍 Thnx 😃🙋🏼‍♂️

The same graph works for Amps vertical vs rpm . Higher rpm creates higher impedance ( resulting from back emf) the higher the impedance the less Amps and the cooler the motor windings will be , especially on a fan cooled motor or generator.

The 500W at high torque vs high rpm example is awesome.

I just found your channel and subscribed immediately. I also have followed the "Johnny Nerd Out" utube channel. I just received my BBS02 kit today and should be installing it on a Rocky Mountain Soul in the next few days. Thanks for sharing your insights, experiences, ideas and opinions. I may not order the gear shift sensor now dince watching your videos. Brad in Calgary, Alberta, Canada

Very good job! Today was my first day out on the road with my BBSHD. This video was just what i needed to see. 😃

Thank you ! Top grade info. Do you have any recommendations for Assist level values when programming the Bafang BBS02 ?

I'm gonna be guy number 1. Awesome explanation.

%100 !

I'm kind of annoyed now. I already subbed after watching the last video, and now I want to sub *again*. An excellent - and often funny - explanation!

If you want your mid drive to last then what this guy has explained makes a sense. USE YOUR GEARS AND THE POWER LEVELS IN THE CONTROLLER. I have the bafang hd. I use the gears constantly as well as the power levels 1-9 appropriately, not power levels 1-5 or 1-3 and I hardly use throttle in fact maybe 3 times since I have had it. If you have a bafang mid drive and use either power levels 1-5 or 1-3 then change it in the controller settings to 1-9 and use them just like the gears too as it will not only make your mid drive last longer but also your chain and sprockets.

Sick mullet bra

Great explanation! What rpm (or revs per sec) would you say is optimal for the bbs motors?

I got my Bafang 750 w from Johnnynerdout he said to change the gears like you would a motorcycle. Always start off in the first gear and try to not ride constantly in the lower gears if your speed doesn't match. I usually cruise in 3 or 4 gears on an 8-speed but, I am pedaling.

Thanks for the video. It's funny how the United States refusal to get on board with the metric system drives you nuts, hahaha. I have lived here 64 years and I agree 100 %.

hi, loved the video, shifting is hard (in middrive) maybe that is why people don't want to do it. I have a problem of alignment; wanted to replace my stock bafang 44t with a lekkie chainring but do not know what will work best 46T or 42T? My cassette has 7 speeds. Perhaps you can chime in.

I tap my front brake when I shift. Like a motorcycle clutch. Saves a lot of wear on the drivetrain.

I got a 30 tooth front ring and am now a cyber biker!

Perhaps Bafang put a smaller diameter granny gear in order to create more motor sales due to burn out? Only half kidding. Thank you for the information!

This theory and practice applies to riding torque sensor motors as well ya get the revs up before shifting?

I was up to buy BB01/2 or any MID till I saw your movie about common faults and how this engine is build 🤦 Now I am winded up because from the one hand mid gives me clean and easy transition but doesn't provide safely what I like in electronic engine that high torq in low RPM and instant kick back as a result. 😢 Because Bafang doesn't have any torq limiter it drives me to the stright conclusion that at least some sort of guage would be nice to have with any mid motor. 🤷 Knowing the size of the parts and having preassure sensor under the foots it might be possible.

Hello Felipe, I hope you’re doing well! Can we use battery power consumption (Amps) to have a real time efficiency monitoring ? I mean, while we throttle the motor if the Amps values are much higher that means we’re running in a lower efficiency range ? If yes, is there a way to extract Amps values from bafang display ?

"if it's on Earth!" lol Even if you are in the US... Great Video! You know the USA is above the Earth right! hahahaha.

Hello again!thank you for the awesome video.But as a food delivery guy,i do many many stops and i cant always start with first gear(i do 100 km per day). I set a all time gear wich is great for me meaning gear number 4 (out of 8). Wil that do damage to my motor using it like that?I mean is not like i am using the last gear

Thank you for your video. For us idiots out here that don’t know any better could you please tell me what I should be doing or what I should not be doing to prevent damage to my bafang motor in laymen’s terms please? You definitely know you trade and fully understand the physics along with years of experience under your belt and I want my bafang motor to last as long as possible. Please respond and what the fuck (just kidding).... Thank you and I hope to hear from you soon.

Okay, so I get the math, but lets say you have an hd, hard tail, and you want to tune it for range, but want torque for the hills for bike packing and camping, not mtb riding, and your country limits roads to 15mph..how do you go about that? what pas settings, gear and casette? I've ordered a 46tooth 52 vlt version, with a 48/20 battery to get used to it and for the shorter commutes and will upgrade to a heavier battery later. Was thinking I should add the lekki 42, with an 8 speed 11-42 or 11-48 sram.. Suggestions for pas, and thoughts on this set up please? Because i've seen the hd tackle 45 degree inclines without immediate issues which is why I went with it, but wheres the safe line for torque in practical terms...?

I've noticed that my Bafang starts making a clicking noise if it is between half and full throttle. While I shift often and pedal a lot, I fear I may have pushed my motor a bit too hard yesterday. Do you have any idea what could be happening? Bearing failure? I am hesitant to keep riding it hecause I don't want to damage it further.

So you saying it is best to get a rear hub drive than mid drive if you prefer not having to always shift gears?

I have a rule for my bafang that i won't be in the red at under 100 cadence. Preferably 110 to 120, although it's hard to pedal that fast for a long time especially when my seat post is rusted a bit too high. Internal combustion engines tend to be more efficient loading down lower (but not too low) rpm.

May i ask a question please. I have a bbs02b 500w 48v. I don't like the throttle and never use it, it just gets in the way. Is it ok to just disconnect and remove it or would that cause problems?

Does taking off on pedal assist level 3 on gear 1 cause damage to the motor?

The new CYC PHOTON will revolutionize mountain bikes and ebikes in general. ....

When l ride my bafung mid drive ebike l for the most part try and match my 9 speed cassette gearing to the 9 levels of pedal assistance from the motor . Only exception is maybe stopping and starting off from traffic lights, always attempting to stop and start out in the lowest gear possible no matter the pedal assist level though l will try to match up as much as possible the peddle assist mode with the gearing in this scenario as well. About the only time l use the throttle is from a stationary start at lights to get me up to speed at busy intersections.. In other words low speed low gearing, mid level speed, mid level gearing, high speed high level gearing. Simple as that. As far as gear shifting goes use either a shift sensor or a brake sensor to kill the motor before shifting up or down that way you just keep on pedalling when shifting as you would on an analogue bike. By the way bafung conversion kit brake sensors only work on mechanical disc brakes not for hydraulic disc brakes. So yeah keep on reving that motor and and running up people's backsides with that short burst of speed from the throttle or leg cadence speed. You'll at least come away a lot fitter after following this advice if nothing else. If that sounds like to much effort just get yourself a hub driven Ebike for a couple of grand and don't worry about rpm's or gear ratio's

The motors torque does not yield to sticks that have bent and broken several derailleurs while remote in the woods. I would force ride it home in any gear that I could get the bike to move in. Now my motor is not spinning freely like as if something is bent within. I will from now on maintain my derailleur as well as carry a spare.

Mutha Fucka pmsl best channel clearly explaining the workings of motors, yes everyone on youtube is torque speed etc no one else seems to have any idea great video just need to watch the next one and well done Cyberbikes

Welp. I done broke mine. Now I know why.

So basically make sure the gear you're in matches your ground speed, just like you would ride a motorcycle right?

WTF? Joke aside, very nice video 😊

The high torque motors sound like trouble, that its just a matter of time before you break something

So basically start in top of cassette and as u pickup speed switch a gear then go faster then change gear and so on

👏😅

Great Information -- Thank You! Why do you think the Bafang Kit have only the Larger sized, High Load ChainRings available, like: 50 / 48 / 46 / 44 ? If they wanted to improve the Lifespan of their motor they could easily offer Smaller sized, Low Load Rings: 42 / 40 / 38 / 36 / 34. I see many people having to buy custom, expensive smaller rings; Or buy an Adapter and use smaller Shimano / Sram rings

Ugh!😂. 1:29

To bad the Bafang drives at such low rpm. Then hitting high rpm is impossible

Let me simplify it’s like your car shift gears the same.

So bottom line, stay in the lowest gear possible

ECRIS PLUS GROS S'IL-VOUS-PLAÎT

Very bad explanation, person who understand is only you. High speed? of what, rpm of what, oh bloody hell, I would love to understand this problematic but it is so difficult from your video. High torque? where?

You could drop the condescending attitude.

American engineering made it possible for flight and too many to list, so maybe you should get your history straight and get over yourself.

Americans hate haters too. I learned the metric system in school in the 60's. We were told that by the time we were adults, we'd be fully on the metric system. That didn't happen. I appreciate the simplicity of the metric system, but because our country is so large from a population, geographic and influential perspective, the tail does not wag the dog easily. Most Americans are comfortable doing the quick math when we see "foreign" measurements and operate easily between the two systems. Let me help you. 7mm is a "c*nt hair" over a quarter inch. 12 inches to a foot and about 5200 feet in a mile. A kilometer is .6 of a mile. A kilo is 2.2 lbs. 16 ounces are in a lb. and 28 grams are in an ounce. Water freezes at 32 degrees Fahrenheit, boils at 212 and 70 degrees is a perfect day. Knowing how both systems work is another way of being bilingual. Those conversion numbers live in my head. Getting back to the subject, -as a result of your video, I'm going to re-think changing my 11 speed SRAM to a single speed 15 tooth cog when I convert my Salsa Mukluk to electric next week. Front chain ring is a 42. I don't want to burn up the Bafang, but don't want to worry about chain breaks and chain drops either. 3 months ago, I purchased a Radmission ebike on their clearance sale just to experience an ebike. I like ebiking so much, I'm selling my touring motorcycle and planning bike packing trips on the Mukluk pulling a solar generator. The Radmission is single speed with a 500 watt rear hub motor. I don't mind pedaling as hard as I would on non ebikes. I use throttle assisted starts and power assist level 1 while riding the Radmission. Reading about chain breaks and chain drops with the Bafang combined with my experience on the Radmission is what led me to consider a single speed conversion. I'll do more research as a result of your video. Thanks.