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I am looking to replace a ku123 controller for a Bafang BPM 36V500W motor. It would seem to make sense to use a sine wave controller. I would be grateful for advice about which contoller.

Can anyone offer advice on the bafang crank drive kits? Are there a range of chain ring sizes available? Is it possible to have 2 chain rings and a front changer? Does the crank kit have a speed restriction and is this configurable? Does the motor bottom out over speed bumps or uneven terrain...

My thumb throttle has developed a fault and is no longer giving full power - I checked with a twist grip and the system is ok otherwise. Does anyone have a spare 36v thumb throttle so that I don't have to wait an age to order one from china?

Hi, My converted bike seems to have stopped responding to the throttle and my suspicion is that the controller has junked itsef again. Has anyone out there got a KU123 controller suitable for a bafang 500w bldc motor. If so please let me know details. Other than that I suppose I'd better...

Hi, I have a LiFePO battery from BMS battery that is about a year old and has had 50-100 charges. Recently the range has dramatically reduced but I am not sure why. The battery has a BMS - all cells are balanced equally when charged and when discharged. The bike works fine when the battery is...

Has anyone got a good suggestion for hydraulic brake switches?

I am thinking of getting a retro fit rear hub kit from bms battery. The gear looks great and well priced. I would appreciate any feedback about the quality of the equipment and comments about the kits.

I am about to buy a rear hub kit from BMS battery, but I am unsure about how to decide on what voltage to go for. Please could someone advice on how to decide between 36v and 48v systems.