I don't know if this is the right place to make this post but here goes.
I have a Kalkhoff Tasman that I bought from 50C in June 2015. It has done about 1,000 miles.
I have not noticed noise from the motor.
However I posted last October that I was having a problem that, occasionally while out riding the motor assistance would cease. Eventually I could not get any drive at all and the display had gone. Then after some switching on and off of the machine, while the bike worked correctly the display had gone blank. I contacted both Kalkhoff (who suggested it was the back pedal brake which of course I haven't got) and 50C who promised a call-back from a technician which never happened. In desperation I finally cleaned all the contacts on both the battery and where it plugs in. It's been fine until today.
Today I set out for a ride. This time the display was working properly but I have no motor at all.
I have contacted 50C but no reply as yet.
Anyone else had this or anything similar?
John