I have posted this on the general forum in the hope of reaching as many Bosch powered bike owners as possible.
About a year to 18 months ago, Bosch started supplying and fitting a felt seal. It fitted behind the circlip on the right hand side of the crankshaft, in the space between the...
This shot is from a video about repairing a Brose motor. - (worth watching) from which you can see the damage done from water ingress to a motor. The bearings are all shot and the discoloration is from all the rust. My feeling is that at the moment many EMTB motors are simply not properly...