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Bafang crank engagement broken. Thread starter Mark Lester Start date Jul 7, Mark Lester Pedelecer. Jun 16, 42 4 56 uk. I am trying to work out what this bit is even called. Symptoms: a few nasty clicky noises and then while the motor still runs it isnt driving the chain wheel.
Even worse and odd, i cant even pedal. I took it off and then it worked. So I put it back on, got 50 yards, and it happened again, not even pedals will move the chain wheel. Possible cause: I followed a national cycle route through a sand dune. I subsequently did two other beach runs before being told off by my cycling mentor. There is still grit everywhere.
I have now ported to a new fancy pants bike, but the motor has had may be miles to ingest this sand. Suggested solution: I have taken the cover off the crank area so I can see the small wheel from the bafang meshing with the large crank. Getting any further looks harder. I am proposing to attack it with WD40, try and run it on the work bench and continually spray with penetrating fluid, like buckets of it, then whack a load of grease back on and pray.
Mar 14, Reactions: Mark Lester. Deleted member Guest. This shows you how to disassemble. That's the thing you need to look at. It could be that the pawls are just stuck because of rust after water ingress, especially if you've been near salt-water.