radvis

Hi I need to test the functionality of the new rear wheel motor before I install it (along with the new controller and battery) into the bicycle frame. I have a brand new Bafang motor in a fully laced wheel rim (the wheel is separate and not yet in the bicycle frame), a new controller, and a new battery. I plan to connect everything with cables and would like to check if the motor spins (to confirm it works). Is it enough to connect the two throttle wires coming out of the controller, or do I need to test it another way? RV

Bingo! The problem was indeed with the incorrect wire order. I swapped the wires into the correct order, and everything is working now. Thank you for the helpful comment that led me to the solution!

Since I don't solder every day, I guess I may have soldered the wires incorrectly during the replacement of the control unit. Corrosion may have occurred too as I ride my bike in the rain. I'll start by fixing the connections with better connectors and then see if the heating issue recurs.

Thank you all for the comments and suggested solutions.

No information about pinouts. However, here are the pictures of my controller and the purchased thumb throttle (https://amzn.to/4gxqCE6). The controller diagram was provided by the bike manufacturer. Hopefully, this might help with remote diagnosis of the issue...

No. The thumb throttle device does not respond in any situation – whether the bike is stationary or the motor is already running and I'm pedaling. The motor only activates in response to pedaling, i.e., through the PAS sensor.

I'm not sure if I asked correctly. I installed the thumb throttle so that I wouldn't have to pedal at all, but rather that the device would engage the motor by pressing the throttle without the need to pedal. I have a manual for my LCD display (Nokee-U - https://bit.ly/3XPNqHS), but the thumb throttle is not mentioned in the manual at all.

I have a fat bike with a motor in the rear wheel (Bafang 250W). The control unit (voltage 36V, max. current 17A, rated current 8A) has a connector for both the PAS sensor, which is currently active and functional (the motor only engages when the pedals are turned), and a connector for a thumb throttle, which is connected via a cable from the unit to the handlebars, ending there in a 3-pin SM female connector. I bought a brand new thumb throttle, compatible with my motor and having a 3-pin SM male connector, but after connecting the connectors, the (thumb throttle) device does not work – pressing the throttle does not engage the motor or cause any other response. Does anyone know what needs to be adjusted or configured to make the thumb throttle work (to engage the motor)?

I have a fat bike with a motor in the rear wheel (Bafang 250W). During a routine check of the control unit (voltage 36V, max. current 17A, rated current 8A), I discovered that all the cables connecting the battery (Li-ion Silverfish 36V/21Ah) to the control unit have partially melted insulation (shrink tubing) exactly at the connection point (where the battery cables connect to the unit cables) – see the attached photo. The control unit is relatively new, installed approximately 15 months ago. The battery is older, installed around 5 years ago. The previous control unit (identical to the current one with the same parameters) was installed with the current battery for about 3.5 years, and the cables never showed any issues; there was no melting of the cables at all. Does anyone know what caused the current cable melting and how to prevent it?

I am experiencing a serious issue with my my Specialized Turbo Levo e-bike, powered by a Brose Drive S-Mag, Gen 1 (C16162). It has stopped working after I uploaded a third-party application to control it. After the failure I went to an authorized Specialized service center, where they performed an in-depth diagnosis and found that the motor, battery, cables, and other accessories are perfectly fine. They performed a complete reset of the motor to factory settings, but it did not solve the issue. The motor still does not work. Here is chronologically how the failure occurred: 1. I had the Specialized app installed and connected to the motor; everything worked fine. 2. I deleted the Specialized app and installed a third-party app (BLEvo); everything worked fine. 3. I reinstalled the Specialized app, keeping both apps connected; everything worked fine for a couple of kilometers. 4. The motor stopped working for the first time. I tried reinstalling and resetting all settings; the motor worked fine for a couple of kilometers. 5. The motor stopped working again. 6. I went to a Specialized service center, and the technician said the motor is fine but that installing the third-party app "blocked" the motor. Can anyone please guess, based on this description, what the failure might be and how it might be fixed? Thank you in advance.

I have a city ebike, with 20-inch fat tires, a folding one, very like the "Mate X" bike. It is quite heavy, a 25-30 kg bike. I am quite not satisfied with my Tektro Auriga hydraulic brakes, with the 160 mm rotors. The brake pads wear out quickly, there is still random parasitic noise even if I do not brake. So I am considering the brake upgrade. What brand/model would you recommend me to go for? I have no financial limit, I am simply looking for the best option for such an ebike. RV

Wires/connectors are identical. What differs are the current/voltage values. To install a switch? Can you be more specific, please? I am just a bike user, not a technician.

Hello I have an city ebike, with Bafang rear hub motor (36V/250W), Silver fish battery (36V/21 Ah). I am forced to replace my controller unit, due to a minor failure (front light stopped working). The current controller unit has this specification: Rated voltage: 36V Maximum current: 17A Rated current: 8A Low voltage protection: 31.5V Throttle adjustment voltage: 1.2v-4.4v (Ex-factory date: 05/2017) Unfortunately, this controller is not available anymore. The question is: may this (current) unit be replaced with the following one: Rated voltage: 36V Maximum current: 12A Rated current: 6A Low voltage protection: 29V Throttle adjustment voltage: 1.2v-4.4v (Ex-factory date: 08/2017) I was wondering if the new unit will work fine on my bike, will not affect the motor/battery? Thanks in advance for any help related to my problem.