If the axle does not fit into the dropouts because it is slightly too big, you may need to file the inside of the dropouts in order to fit the axle on the e-bike kit motor. Please ensure you do not file more than necessary and that filing the dropouts does not damage the integrity of the forks. Filing is appropriate for steel forks but may be done on aluminum forks with user caution. Only file what is necessary and do not file beyond the secured metal inside the dropouts. Please see the video below for a demonstration.
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