8fun250watt motors.

[gerryscott]

I know all about the life expectancy of batteries, but I'm just wondering what would be the average life you should get from 8fun 250 watt motors?

 

[Deleted member 4366]

I heard somewhere that the Bafang test spec is equivalent to about 40,000 miles. Mine has done 2000 miles, although it became a bit noisy after I stalled it on a very steep hill due to somebody blocking me. I've heard of 20,000 miles plus on other forums, but I would guess that it would be prudent to re-grease the gears after every few thousand miles, but it's not so easy to get them apart without the special tool. Mine's really tight and I haven't managed to open it yet. It's the sort with the four slots in the side (SWXK). The ones with scews aroud the periphery (BPM, SWXB) are dead easy to open.

 

[flecc]

Generally very reliable, the main problem is failure of the internal nylon gears. There have been a very few initial failures, I suffered one at 200 miles, but that's rare and warranty covered anyway.

Otherwise, the gear life is directly related to how highly geared the motor is relative to the wheel size, the peak power rating of the system and how much the rider pedal assists, particularly from a standstill.

On the most powerful and high geared setups like the 22 mph assist, 700c wheel eZee Torq 1, failure at about 5000 miles has been fairly common, in hilly areas particularly. On more moderately powered and geared systems, the motor can run trouble free for many thousands of miles with a reasonable amount of rider assistance.

Most suppliers stock gearsets which are not expensive and easy to replace in the screw side cover versions.

Otherwise the only problem that's occurred in my experience has been the odd failed internal Hall sensor, from memory just three reported in this forum in the last five years, so quite rare. In two cases the sensor was replaced since one owner had the necessary skills, the second guided by the first owner in doing the job. However, it's not an easy job and a new motor can be so cheap most consider them not worth repairing this fault.

I've never known a failed bearing and in all other respects they are almost unburstable when used correctly.
.

 

[Kudoscycles]

Never had a warranty failure on any Suzhou Bafang equipped Kudos bike to date....they seem to be one of the most reliable bits of the Asian imported product.
Dave
KudosCycles