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Hi, I’ve just discovered this same problem on my impulse 1.0 - did you manage to find a solution?

Slight problem on the above - the chain wheel has come loose - can still ride the bike - I can’t actually see that a loose chainwheel will come off. All the same, it would be good to have it tightened and there is an annoying squeak as the pedals turn. Any advice would be welcome

Sorry to be a pain...but what should those three lights be doing normally - if there is no fault detected? Regards.

Many thanks for the reply

The three battery lights are constantly flashing on my Kalkhoff Impulse - see attached pic...does anyone know what this signifies? Thanks in advance.