CNE bike hub motor problem

bluesoleli

100 mW
Joined
Jan 9, 2014
Messages
36
Location
Sydney, Australia
Hi Everyone,

About 6 weeks ago I bought myself a CNE bike conversion kit for $250. It's 200W and geared front motor. This price was dirt cheap as the store just wanted the kits gone. Anyway it's worked without a problem up until last week where it would cut out everytime I went over a pothole or bump. The cutout would vary between 5 seconds to 15 seconds, in this time the bike was obviously still rolling freely. I checked the wiring to controller - all good, checked throttle wiring - all good. No PAS on this bike so I ignore that. Today it completely died and I could feel the motor had a lot of resistance when I tried to spin it backwards, spinning forwards still normal and free. It's as if the gears have jammed one way. I was in the middle of my destination when this happened so I pedalled on. Once I got to my location, I checked again and it was still jammed or "really hard to roll" backwards, I then continued to pedal home and check again where low and behold it was normal again, both backwards and forwards rolling freely (as if a gear popped back in) and so I put the keys back in the ignition and it functioned like normal!
Was curious so I took it out on a bumpy road and every bump it would cut in and out, in and out. Great. It's under warranty for another... 5 days. I'll return it obviously but what could be causing this?

At first I thought it was a cable issue or something was loose... turns out it wasn't.

I do however want to upgrade to a BAFANG 8FUN front motor in the future so I am hoping it works with the controller I have now. I hope BAFANG is a reliable brand as I always see them on the top stuff e-bikes from Promovec or Peugeot etc.

Thanks.
 
Could be an intermittant short on the motor phase
 
Something's definitely loose or broken inside the hub motor. Today it worked as per usual but i could hear crunching noises at times. Not good.

Seller said to bring it down for an exchange.
 
So was the fault broken planetary gears or clutch or something else?
 
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