Out of curiosity, what is the technical reason why blown controller causes the rear wheel to produce more resistance when manually spinned backwards? Then, when I charge the battery, it only charges for an hour and then shows as full. I m very disappointed because he motors stops working exactly when I need it. Yesterday i removed my bbs02 (which was working fine) to grind back my BB to get a better chain line as i have a mighty mini on the way, put it back as normal, re-soldered the connections for the battery and did a quick test. Replacement Bafang wiring harness available from Amazon. Trying to see how hard it is to change them out. Be aware that your controller can be fried and you can still hook it up to your computer and access all the settings. Controller failure can happen for several reasons and there are things you can do to prevent this from happening. Bafang BBS02 I use a small piece of gorilla tape wrapped around the spoke and then locktite the magnet sensor down to the spoke as hard as I can. Below is a list of what is always included. Can you elaborate on what the problems would be with using a bafang mid motor with such a combination. Most people have a favored foot that they feel most comfortable being forward when you are not pedaling, just swap it with the other foot and keep ridinglike a hooligan. I have no idea what to do. If you grab the rear wheel and spin it backwards, if theres significant resistance, this can indicate a blown controller. The contents of the kit may vary between suppliers, as some will add extras like a lockring spanner and a gearshift sensor. There is no indication on the display that there is a problem. Its relatively cheap and an easy fix, the instructions are located here. Hello, hope all is good. Youll need a laptop or desktop PC, a USB programming lead and a copy of the free Bafang config tool. I therefore bought an ebay controller, and whollah it worked again. Forums New posts Search forums Make sure the crank arms are tight. Without pedal assist, I can hit 30 mph on straight land and no wind. Local time 10:35 PM Joined Feb 24, 2022 Messages 12 Points 3. Replacement Bafang controllers are available from Amazon. #1. If the plastic connector has started to melt or the contact is black and damaged then replacing the connector is recommended. If you are having continual chain problems where the chain keeps slipping off the chainwheel no matter how you adjust the tension then you should swap the chainring out to a Raceface Narrow\Wide or a Lekkie Bling-Ring. Still waiting on the Hyper Fat from Juiced Bikes because I think that will be a beast! To date, this feature is only available on their M models which require a special frame for fitment. Read our affiliate disclosure. BAFANG 750W Mid Drive Kit, BBS03 BBS02 1000W 750W 500W Ebike Conversion Motor Kits with LCD Display Electric Bike Conversion Kit . I am all for a simple replacing, i do not have the time and resources to work on this as if i am some e-bike mechanic and i am not interested in trouble shooting anymore. Kinda, When the no power issue happened on mine, I did all the checks i could cleaned all connections, even took the drive unit apart and ohmed all the motor fields. Any thoughts? A: No, you can only use the BBS02 on a bike with a 68mm-73mm threaded bottom bracket. Is it something I did or unrelated to my recent tampering? It seams totally random. All the information below has been gathered over 3-years of hands-on experience with this motor. Rubee X E-Bike Conversion Kit: Fricton-Drive Reinvented, Swytch Electric Bike Conversion Kit Review, 4 of the Lightest Electric Bike Conversion Kits, Accolmile Electric Bikes [Range Overview and Specifications]. Replies 24 Views 35K. Having more than one drive unit is a great way to swap parts around and find out exactly what is wrong. Why? If you have any questions relating to the Bafang motor, please feel free to leave a message in the comments section below. J. Bike is doing this.. please help. Issues & Problems with Bafang Products + Help, Dont forget to locktite and install the 2nd locking ring which will keep the first locking ring from loosening up. A messed up pack or a pack with poor electrical connections can often read full voltage with a normal voltage meter but as soon as there is any load on it the voltage can drop precipitously. Expect the rubber washer to be severely mangled on every drive unit you get. The chainring wiggles laterally on the bike and the pedals wiggle too. Sometimes a poor solder can cause the problem, or they can just fail. Ultimately Luna told me my controller was fried and I should replace it. Out of stock at Lunacycle, try California ebikes. Lithium is today the top level of lifespan and this battery allows me to do 25 miles without problem. Bafang bbs02 problem The brake handle does disconect power to the motor as it should. If they arebent youll see it. This is actually a problem Ive had more than once and it is a little tricky to fix. Programming the controllers is pretty easy and even non-techies can do it but it voids your warranty so be aware of that before you do it. It's a Rambo Roamer and have been having a problem with the pedal assist. Or head on over to my BBS02 Forum, where theres an archive of over 300 posts from the last 4 years.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'ebikechoices_com-small-rectangle-2','ezslot_23',184,'0','0'])};__ez_fad_position('div-gpt-ad-ebikechoices_com-small-rectangle-2-0'); Meet Tony, a passionate e-bike advocate and enthusiast who discovered the life-changing benefits of electric bikes back in 2016. Sure, if you can stump up an extra couple of hundred, then Id seriously consider the BBSHD. Be careful not to get any black heavy axle grease on the white wheel. This grease can break down the nylon and cause the gear to fail prematurely (as shown above). Feb 3, 2023. This is less of a problem with the newer mosfets, but it can still happen. Bafang Hill climbing is its forte the BBS02 will eat 25% hills for breakfast! I have a BBS02 that failed to start up a few weeks ago. I recently discovered this new twist on an old idea and felt compelled to dig a little deeper. U should be able to program the delay of how long it takes the motor to cut off once it doesnt feel the road anymore using bafangs software. Convert a Road Bike to Electric: Flatten Those Hills! If the nylon gear is fine when you take it apart then you should check the secondary reduction gears (both are metal so unlikely to fail) and also check the freewheel which is located on the main axle inside the large metal secondary reduction gear. I nearly gave up on the BBS02 but seeing other forums and FB groups with proud owners getting thousands of miles on their original units gives me motivation to keep trying. I bought a second hand Bafang BBS02, 750w kit. Hello, all the best. I have installed both the BBS02 and BBSHD on carbon fibre frames before without any long-term issues. Bafang says the problem is in the bms module thatis not communicating with motor because of Would love your thoughts, please comment. For a better experience, please enable JavaScript in your browser before proceeding. Battery is 48v 17,5Ah. After Sometimes that means a DIY fix and other times it can mean a recall, software update or part replacement by a dealer. Bafang BBS02 48V 750W mid-drive PAS Problem They are all out of stock in US and asked me to check with the Rambo Canada to see if they have any in stock so I'm waiting to hear back from Rambo Canada. The throttle works fine, the walk assist works fine, but when I pedal, there's nothing. Most users report a top-assisted speed of between 28-32 mph. I purchased a 20 amp hour 48v. I know the bolts are not tight when I hear a rhythmic clicking noise as I pedal. Now, I am a bit confused. It may result in complete loss of power or the malfunction of other components like the display or speed sensor. Hi George, this is super late, but I just found this blog and my controller is fried due to a really dumb mistake (red and black wires touched causing a short circuit). problem Bafang BBS02 Bafang BBS02 I know the Hope you can help me shed some light before I redo everything. Bafang BBS02 The bike also has a throttle which I only use to get going when I am stopped at lights. Menu. Looking for advice on troubleshooting BBS02 Its possible to get very high mileage out of the BBS02 with sensible use and periodic maintenance. Bafang BBS02 48V 750W mid-drive PAS Problem. You can achieve the same power as a 48v battery but with a low current (amps). Nothing came up on the display and for all intents and purposes the bike was dead. On the BBS02, The PAS sensor is inside the motor. Bafang BBS02 750W fluctuating power problem Tonys technical experience within the e-bike field was gained while running a successful electric bike conversion business for 5 years in his home county of Cornwall, UK. That Is The Question, https://drive.google.com/drive/folders/1gqvb_eDRITrOKZJxmWF5GKFAhUGFl8xP?usp=sharing, https://drive.google.com/file/d/14dPRp7cNPxrz1yxDhNpF7BdkexE2Wre9/view?usp=sharing, https://electricbike.com/forum/forum/main-forum/diy-discussion/109869-bbs02-mid-drive-kit-basic-issues-fixed-on-rockhopper, https://lunacycle.com/parts/bafang-parts/bbshd-parts/bbshd-clutch/, A Hacker's Guide To Programming The BBS02 & BBSHD, Programming The BBS02 & BBSHD Without Frying Your Controller And Losing Your Sanity, I Void Warranties : Hacking The Bafang Ultra Max Mid-Drive Ebike Drive, Take A Wild Guess : Selecting The Best Front Chainring Size For A Mid-drive Ebike On The First Try, Kill Yourself 50% Faster With 2x The Power: E.R.T. Sensor should blink when the magnet passes. Please let me know if you have found a workaround. I did that and it made no difference. If you buy a drive unit with a battery pack most reputable vendors will set the LVC on the BBS02 to match the pack it is mated to. E-Bike conversion kits remain a popular option in 2023 and the Bafang BBS02 still reigns supreme amongst DIY electric bike enthusiasts. Mar 30, 2023. Ref the video You should have about 5mm of clearance between the magnet and the speedo crosshairs area. Ive also heard of people having their cabling on the display break internally and getting the same 30 error. Power is cut and not allowed. I do have a fat bike now with a Bafang 750w hub motor and Samsung. My BBS02B works really fine on stand (no load) both on PAS and throttle. Holding down the "+" button does not turn on the headlight. BAFANG motor issue Did you figure this out? Bafang BBS02 A: It is not 100% waterproof. removed controller and checked wiring (and gearbox hardware). Nov 26, 2021 #1 Recently purchased my first ebike. After learning that the problem would more than likely be caused by a controller failure, I sent for and replaced the The Bafang BBS02 conversion kit is a really popular kit among DIY ebike builders. More than half the time when a controller goes bad its because these connectors have just come loose. The best course of action on fatbikes is to twist the speedo up or down out-of-the-way then remove the tire for service and then twist the speedo back after the tire is remounted. (750 motor) no problem. Read our affiliate disclosure. A 52v battery when fully charged is at 58.8v, this is very close to the motor controllers maximum operating voltage of 60v. With pedal assist I have seen 36 mph. 04-09-2016, 09:04 PM. Theres a fairly large clunking sensation with power loss at those times I'm not sure if this is one problem or two. PAS level 7-9 are plenty strong not to use throttle too much. I had ordered a new main gear and the clutch from Greenbikekit.com. Crossroads. Installing the BBS02 controller. 08-21-2021, 03:56 AM. JavaScript is disabled. 09-22-2019, 12:44 PM. We use cookies to ensure that we give you the best experience on our website. Holding the power button down does not turn off the motor. I am charging it off the bike. When you purchase through links in our articles we may earn a small commission. Yes, you can use a 52v battery with the Bafang BBS02B. Its a real beast of a motor and is reliable to boot! Personally, I am leaning towards it being a battery issue as well. All was good. A: I would personally stick with a 48v although there are benefits to using a 52v battery. I works but low power. hi, does anyone advice me what is the problem with my bbs02 750w 14ah battery? Thanks Court for the reply! The problems arise when things suddenly stop working. Nov 22, 2021. tomjasz. The most common of these codes is the 21 code which shows a problem with the speedo. I was just wondering if there are some settings in the bike computer that I should be checking, or if there could be a fuse somewhere that needs replacing? Mat995; Feb 3, 2023; Replies 0 Views 294. Hi George, this is super late but do you still have that spare controller? Mat995; Feb 3, 2023; Replies 0 Views 294. WebBafang Motor getting loose is a common problem among BBSHD/BBS02 riders. https://drive.google.com/drive/folders/1gqvb_eDRITrOKZJxmWF5GKFAhUGFl8xP?usp=sharing Nov 26, 2021 #1 Recently purchased my first ebike. In this comprehensive review, I take an in-depth look at the installation, motor performance and potential problems that may arise with this popular option. If your speedo magnet is gone the BBS02 still works just fine and if you want to shift PAS levels up or down just tap the ebrake and the 21 error will disappear and you can move up and down PAS levels for a few seconds before the error appearsagain. Any other mid-drive ebike kit is going to take a lot more time and energy toinstall and get working properly. My computer and thumb throttle made sure all connections were good and i have power to my motor case. I have listed some of the possible causes below.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'ebikechoices_com-small-square-1','ezslot_24',177,'0','0'])};__ez_fad_position('div-gpt-ad-ebikechoices_com-small-square-1-0'); A hall sensor provides rotor position feedback to the controller. Hello It doesnt cost a lot of money to get started. tomjasz Bafang BBS02 PAS/Throttle Problem. I had mine at 18A and it still went very in full power mode! If you have a 68mm BB BBS02 then most likely the main locking nut on the drive unit has loosened up. Then the Tongsheng TSDZ2 is going to be a better option. This varies greatly between suppliers and you should always buy from a reputable source (always check customer reviews). Its a real shame Bafang didnt make an upgraded version with a torque sensor as that would have taken the BBS02 to another level. If youre getting the error and everything seems fine then grab the connector firmly and wiggle it to make sure the unit has not broken apart and just appears to be fine from the outside. When using the pedal assist I keep using power. Because it costs $25 and its not any better than the crap Bafang sends you for free, thats why. My bbso2. Bafang BBS02 Bafang BBS02 On the BBS02, The PAS sensor is inside the motor. I recently fried my controller due to a stupid mistake (red and black wires touched and short circuited), and am need of a new controller. occasionally the motor will turn if I flip the throttle on several times but that is it. The sensors themselves are very cheap and easy to get. Mar 30, 2023. Installing the BBS02 controller. You must log in or register to reply here. Bafang BBS02 750W fluctuating power problem. The hardest part would be to remove the bottom bracket bearing. I would love to see your designs. Q: Are mid-drive motors better than hub motors? Thread starter maxitwist; Start date Feb 24, 2022; Tags bafang bbs02 M. maxitwist New member. The cheapest place to buy is usually Aliexpress. If it is too tight or too loose you will have problems. If youre not familiar with the e-bike law in your country, its advisable to check beforehand. It depends on what youre looking for in an e-bike motor. https://lunacycle.com/parts/?sort=featured&page=2. If youre having trouble with the Andersons power-poles then try high quality XT90 connectors purchased with pigtails and soldered onto your existing wires. WebBafang Motor getting loose is a common problem among BBSHD/BBS02 riders. Nothing came up on the display and for all intents and purposes the bike was dead. It happens when you are taking your BBS02 off drops, you can try to replace it or you can do what I do and just keep your opposite foot forward on that bike when you ride without pedaling. Or if the brake switch was closed. Yesterday was my first battery charging, everything went smoothly and with no heating on any parts. Bafang BBS02 750W fluctuating power problem. Ive switched displays and done continuity tests on all the cables. Hello! Read the BBS02 vs TSDZ2 comparison article. I purchased a 20 amp hour 48v. With all your experience with this system have you ever had the assist cut out but consistently only on the drive dive pedal stroke? My bottom bracket is a weird size (not 68,73,100 or 120) BBSHD\BBS02 Installation Problems & Fixes For Non Standard BB & Intrusive Chainstays Ton says: November 19, 2015 at 12:59 pm As always, nice article Karl! If you are looking for better top speed, then you will want a larger chainring. Bafang had a run of BBSHDs with a large number of failing displays during early 2016. It seams totally random. I would personally advise sticking with a 48v battery which is 54.4v fully charged. 09-22-2019, 12:44 PM. Theres no easy way around this, and I would stick with 135 mm-142 mm rear hub bikes. BBS02 Unfortunately, as the PAS sensor is internal, it usually requires motor disassembly to fix. If you want an electric bike system thats going to take you up the steepest hill and push you along at a swift pace without fuss, then the BBS02 is for you. You can also replace the mosfets yourself with ones that dont suck from Digikey but its not for the meek of heart and not recommended. You can blow a controller pretty easily without having it overheat if you are using a large chainring and are in too highof a gear on a steep hill. A normal reducer shim may not be sufficient, as its unlikely there would be enough clearance between the motor axle and housing (to clear the BB shell). enjoy. Hi Karl, great post! The controller is blown if the unit does not power off when it dies but instead you hear a bunch of clicks like gears skipping and then the throttle doesnt do anything and you cant hear any motor running at all when you hit the throttle. i posted the mods below. This allows you to know when the unit is going to overheat and to stop feeding it so many wattsbefore it does. J. Bike is doing this.. please help. powered up unit (still disassembled) and wiggle tested all connectors with throttle applied. I wouldnt advise this and would recommend finding a good aluminium framed donor bike.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'ebikechoices_com-banner-1','ezslot_3',172,'0','0'])};__ez_fad_position('div-gpt-ad-ebikechoices_com-banner-1-0'); The Bafang BBS02 is straightforward enough to install if you have the right tools and youre comfortable working on a bicycle.