Top-notch review on the M635, we will definitely need to dial in the torque sensing. and understand the C381 display. You are correct about the Leckie chain ring too. We get the torque sensing dialed in were home-free with another powerhouse mid-drive for future conversions.
Or just tighten the bolt with 120nm of torque, it's actually really crazy ammount. Many people apply 30nm of torque cause that's the max they can without any special tools and wonder why it becomes Loose. I had mine professionally installed by my friend's dad and haven't had any problems what so ever with the motor loosening up, I have driven my bike like 1.2k miles or 2k km so far.
Honestly I am constantly amazed by how much fiddling is needed sometimes - maybe I just got lucky but my ol TSDZ2 has like zero detectible latency and it matches my mismatched legs (I'm disabled) really well without any weird pulsing or strange/confused noises. My leg is worse now so I actually need to set up the throttle but there's no way I'm installing a speed or cadence sensor to mess with what's essentially a bare bones setup that has been working flawlessly as well as seamlessly. The best setup is one that you forget is working. I want to upgrade but I'm hesitant to do any less than a TQ or Fauza, the first of which costs a solid kbuck USD to buy and I'm not even sure where I could get a legit Fauza in the first place. If this one dies, I'll rebuild it or just buy another since they're stupid cheap compared to any other torque sensing mid drive that's worth a fart. I was really hoping the new M series would come through and make things more attractive but I haven't seen enough to get me to change out even if I do eventually kill this one. My big challenge is still figuring out the best way to get Gates Carbon set up on my bent tadpole because the Veer belt sprockets/cogs aren't as robust or functional as the Gates ones - and it only solves *part* of the problem anyhow.
During the pandemic (2020) I became interested in getting an ebike. I did extensive RU-vid research. I watched well over 100 videos. Most were too convoluted for someone with zero knowledge, but over time some general themes began to emerge. The two most important of these themes was, (1) that Bafang offered one of the best series of quality-made motors that could be purchased by the end user; and (2) a mid-drive motor is the best option for an ebike in almost every circumstance--both for ready-made ebikes and ebike conversions. Any ebike that I own will be powered by a Bafang mid-mount electric motor. Mid-mount ebike motors simply offer much more versatility than hub motors.
The ToSeven DM-01 does exactly that and better built. For lower power the ToSeven DM-02 is perfect, torque sensing, better build quality and smaller than the BBS02. The DM-02 have 250-350 and 500W variant while the DM-01 is 1000W only.
@@kazuviking The weatherproofing on the tongsheng wasn't very good and got tired of the failures. I'll only look into getting a DM-01 when there are spare parts also available.
@@joehiatt1992 You can't tell the difference between the bs02 and bbshd in power, 25amps vs 30amps ( continuous ), well i can tell the difference between my two bbshd, one with 28amp controller and one with 30amps. Check the controller settings on your bbshd, seems like they are tuned down in amps and current.
when my BBSHD comes loose, it usually seems to move opposite the rotation of the chainring - UP towards the bottom of the downtube. It doesn't seem like that hose clamp would prevent that? I still think the old mounting system with a stabilizer bar and the 2 bolts was better. As it would prevent rotation in either direction.
Make no mistake, the new method will be very effective. Better to use an industrial strength zip tie...black or white to suit the bike frame color...I have used both. You are speaking about degrees of freedom of rotation. The motor will be effectively captured in CW rotation looking from the left side.
When the motor spins it naturally wants to move upwards(towards the bottom of the downtube). The motor should be installed resting against the downtube, its easier to do this with the bike upside down. The bottom bracket plate, which is supplied with your kit needs to bite into the outer surface of the bottom bracket shell by tightening the lock ring to around 55nm - 60nm of torque, the lock ring cap doesn't need to be that tight. You can now fully tighten the two bolts that go through the bottom bracket plate and into the motor. If this is done properly you should never have an issue with the motor falling down, I haven't.
Best solution, I use them too and should be the go to method in replacement of the hose clamp. Industrial strength zip ties also have extremely high tensile/band strength and of course are much more aesthetic. I am a fan of a non-serrated BB plate unlike Johnny and prefer a stabilizer for BBSHD and I like the eyelet approach on the new motor.
Bbs02 2k km driven, no problems what so ever even when I ride mostly in wooded area with a lot of stomps etc without any clamps I got mine professionally installed for free by my friend's dad who's mechanic and. I think it becomes Loose for most is because 120nm of torque that u have to put to it is crazy ammount u can't do that without proper tools, most people can do max 30and just leave it there and then it becomes loose.@@lukewalker1051
Regarding the rumours about the battery incompatibility with aftermarket ones, what are you referring to when you talk about the display not providing all the information? Hopefully a battery voltage indication is still available with an aftermarket battery, otherwise we’ll have to pursue a second little voltmeter.
As somone who depends on ebiking for commuting, having additional battery information is super valudable, so I'm interested in know what the canbus experience is like when you can test that plese keep us posted!!
Great insight Johnny. Hopefully torque sensing calibration can be adjusted without the CANBUS battery interface connected to Bafang's proprietary battery. Decision to opt for this new motor versus cadence based BBSHD will be predicated on the ability to adjust the torque sensing capability of this new motor to a level you deem acceptable...and sounds like default setting isn't precisely to your liking and hence your meh response. Look forward to learning more. Great and relevant ebike content as always.
Hello Dr. Johnny NerdOut, and thank you for sharing your knowledge and experience with us! What are the differences between the Bafang M620 and the bafang M635? I see both on RU-vid, but I don't see any comparison videos.
Hi, Thank you for the useful information you have shared. Have you been able to test the bafang m635 on flat roads, off-road and high slope roads? If you have tested it, can you share whether the torq sensor is effective or not and how you feel? Thanks a lot for your time.
If using a generic non-Bafang canbus battery does the display at least show battery voltage? Hate the hose clamp. Maybe make a 3D printed spacer to fill that gap between the clamp and down tube.
I wonder if you can take inspiration from the knowledge built up on programming the Bafang Ultra's torque sensing, or does this use completely different software and fields?
Not only does the hose clamp look sketchy, the fact it runs through a round bracket makes me worried about how it will handle the stresses. A flat, non-compressible material can only bend in one direction at a time and for a hose clamp that bend is perpendicular to the running length of the band. But the round bracket on the motor housing presses only the edges of the band and not the middle, possibly causing stresses that are beyond its limits.
any updates on the m635 after dialling in the settings? at toseven, the firmware issues are terrible. good motor design, good display (you can even access and edit FOC parameters in the advanced settings menu!) but horrible torque sensing, plain unusable. actually the earliest firmware was way better than the latest one. m635 and m435 might just be the motor to go for high end emtbs. until they come up with a smaller gearbox to fit most modern mtb frames. the cyc photon is pretty loud, very expensive and has huge cooling issues from using an outrunner motor...
@@JohnnyNerdOut I was told they temporarily stopped delivering the M635 and M435 for market positioning reasons. still got hands on a M435 for which I'm waiting now
@@JohnnyNerdOut I'm really interested in the m435 but cant find any info anywhere. I'm specifically interested in knowing if the canbus interface will allow us to get readings from the torque sensor ( I need it for a personal project to build an auto gear shifter). If you have that info it would be amazing!
@@JohnnyNerdOutlike all the other CAN bus bafang motors, the M635 can be fully customized with the BESST Tool. costs a fortune, honestly, but it looks very good. My M435 is preset pretty nicely out of the box, but there's next to nothing that can be set through the DP C381 display. not even wheel diameter and speed limit. also, no need to use this ugly hose clamp, it does absolutely nothing. the toothless mounting plate is far better than with teeth, because in reality, the frame material is too hard for teeth to fully bite in, therefore the flat rest of the plate does not make contact and therefore no friction. Toseven and Tongsheng don't use teeth either and the motor is held in place rocksolid with proper nut tightening.
Does the Lekkie lock nut not work anymore to hold the motor in place? For information .. what size frame are you using to hold the battery? I’m having a hard time finding a bike with anything other than a small. What is the distance from the crank casing to the top horizontal bar? TY.
@@JohnnyNerdOut I saw some speculation that the torque sensor would only work with a "smile battery" connected, curious if you could test with it as well and see if the feel changes
Interesting. The Torque Sensor in the CANBUS m620 or g510 sends a canbus signal for the Torque sensing aspect. We know this because we tried it with a bac855. It works for cadence based but not ts. So it might be similar here and require the battery. I hope not. It would be a really stupid own goal. @Bengy22
@@HighVoltageKits It would be really stupid but bafang has made questionable choices before, see m625, canbus, the new retention design, the list could go on..... If so Toseven just hit the jackpot!
