I'll start with three quotes I have found about the motor on this forum, feel free to add more information that you can find.
waynebergman wrote: ↑May 29 2019 7:03pmOver the last couple of days I had heard that there had been reports of the M600 drive falling a little short on being up to the task. One es member had sent me a PM with the following text....
"I was on Bafang booth at e bike days in Munich last weekend. They had only M500, M620/Ultra and Hub motors there for testing. So the Technical Support Executive say that they has stopped M600 selling end of 2018 in case the torque testing by nylon/plastic gearing they used will break and they did some modify all with steel gears on this 500W Motor System starts for selling now. Also the road motor M800 with used nylon gear was a prototype there and is broken on testdrive last friday "
Also I have heard that Luna had done some testing and found the motor in its current configuration to be not up to the task for reliability. Some of the M600 motor weak points being no gaskets, no potted controller, and also plastic drive gear failure. So far so good for my bike but hearing this I will go extra carefull not to put the drive to it limits and also because I am light in weight I may be able to keep the drive running longer than many but I will be reluctant now hearing this to let other people test drive my bike. I also want to share any info they may be relevant to someone considering this drive. As always I have hoped there would be many more M600 brothers out there by now but also trying to honest on what to expect from this drive for prospective buyers.
I guess nothing new to realy report on my bike, still working awesome but as stated before - buyer beware, lets hope for some North American support. Other please chime in if you have any first hand info on this drive........
Deafcat wrote: ↑Jun 12 2019 1:48pmYep, the M600 (G521) should actually be capable of 1kW+ and even more than its rated torque, it's based off the Ultra (G510) but on a weight-loss regime. I've yet to pull one apart yet, but if anyone would do us all a favour and open one up for photos that would be great. Gear reduction should be very similar to Ultra just trimmed down, with a smaller rotor/stator from what I can surmise from packaging.
Bigwheel wrote: ↑Oct 21 2018 8:14amThere is a Can Bus protocol imbedded in the BMS for the M600. It probably has an affect on the throttle function. This is a new move by Bafang to come into line with the manufactured products by the EU manufacturers. However, unlike all Bafang products that have come before that are DIY user friendly it does make things less so. This helps to explain Can Buss communications and although they don't specifically mention eBikes be assured that it is being used in this sector and going forward more so on the manufacturer level: https://www.csselectronics.com/screen/p ... ies-Basics
Luckily they are forthcoming with the protocol which as far as I can tell others aren't as proprietary control of their systems is important for them and are unlikely to be shared.