Models with KD21C or KD218 Displays Error codes may only be on the display briefly. If you experience an issue, safely glance at the display to see if ther...

Error 30 indicates a communication issue between the display of your bike and the internal controller. Somehow, the two aren't communicating properly. T...

Primary causes Error 25 has a few causes that are outlined below.  If you are out on a ride, please try the quick fix below. and troubleshoot further at h...

Error 24 is most commonly resolved by checking the 9-pin motor cable connection at the chain stay of your bike. If it is loose, this error will appear on yo...

Causes for error 25 Holding either brake lever when the MODE  or POWER button is pressed to power up the bike will result in Error 25.  To check, turn off...

Error 21 indicates there is an issue with the amount of voltage or current being supplied to the internal controller and motor. This can often be resolved ...