With an assistant picking up the rear of the bicycle, rotate the rear wheel and make sure it is rotating freely ( a little more resistance than a normal bike wheel is normal, if you have to strain yourself to force it, something is rubbing.)
If it spins freely continue to next paragraph. If there is rubbing, rotate the wheel looking between the dropouts and the axle for sections of the wheel where the axle is rubbing on the dropouts. Is the rubbing constant or does it have a pattern (rubbing and then non rubbing) which increases with speed. Remove the rear wheel from the frame and with an assistant holding the axle, gently rotate the wheel. If the rubbing is still present, than there is a problem within the motor, you should contact NYCE Wheels for assistance. If there is no rubbing, and the rubbing pattern increased with frequency when on the bike, use a ruler or level to test that the dropouts are horizontal.
Measure the dropouts to make sure they are 135mm apart (see BionX Bike Fit for instructions on measuring dropout width.)
If the wheel is rotating freely, examine the rear wheel where the wires enter the motor, make sure that the gap in the axle is pointing straight down, it should look like this.
If not then adjust the spacing so that it is, following the instructions in the installation manual.
If your spacing is pointing down the next step is to recheck the wires leading to the motor. Unscrew the plastic caps on the outer sides of the plugs between the battery and the motor and make sure that the soldered points (silver bits of metal connecting wires) are not broken and are not touching each other. A good set of soldered points should look like this
If the connections are good follow the flowchart on the next page. For information on accessing the diagnostic feature, see the last page of this manual.
Motor Doesn't Assist Flow Chart
