Number 6 and 7 on the parts diagram.
OEM jackshaft axis for the Sur-Ron LBX and the Segway X160 and X260, supplied with the crown nut. The axle carries the jackshaft between the motor and the rear drive, so a scored or bent shaft is worth replacing during a jackshaft rebuild rather than reusing.
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You can still order it now — it’s expected to ship in about .