A ball planetary continuously variable transmission system, comprising: a plurality of traction planets distributed radially about a main axle defining a longitudinal axis, each traction planet rotatable about a tiltable axle; a first traction ring and a second traction ring being in contact with the plurality of traction planets, the plurality of traction planets being interposed between the first traction ring and the second traction ring; an idler assembly (31 positioned radially inward of and in contact with each of the traction planets of the plurality of traction planets; a first stator having a plurality of radial guide slots for engaging a first end of each tiltable axle of the plurality of traction planets; a second stator having a plurality of radially offset guide slots for engaging a second end of each tiltable axle of the plurality of traction planets, the plurality of radially offset guide slots formed at an angle relative to the plurality of radial guide slots; a stator driver assembly configured to rotate the first stator relative to the second stator to move each tiltable axle of the plurality of traction planets to a particular skew angle; and a timing plate having a plurality of helical grooves for further engagement with one of the first end or the second end of each tiltable axle of the plurality of traction planets. a plurality of traction planets distributed radially about a main axle defining a longitudinal axis, each traction planet rotatable about a tiltable axle; a first traction ring and a second traction ring being in contact with the plurality of traction planets, the plurality of traction planets being interposed between the first traction ring and the second traction ring; an idler assembly (31 positioned radially inward of and in contact with each of the traction planets of the plurality of traction planets; a first stator having a plurality of radial guide slots for engaging a first end of each tiltable axle of the plurality of traction planets; a second stator having a plurality of radially offset guide slots for engaging a second end of each tiltable axle of the plurality of traction planets, the plurality of radially offset guide slots formed at an angle relative to the plurality of radial guide slots; a stator driver assembly configured to rotate the first stator relative to the second stator to move each tiltable axle of the plurality of traction planets to a particular skew angle; and a timing plate having a plurality of helical grooves for further engagement with one of the first end or the second end of each tiltable axle of the plurality of traction planets. a first stator having a plurality of radial guide slots for engaging a first end of each tiltable axle of the plurality of traction planets; a second stator having a plurality of radially offset guide slots for engaging a second end of each tiltable axle of the plurality of traction planets, the plurality of radially offset guide slots formed at an angle relative to the plurality of radial guide slots; a stator driver assembly configured to rotate the first stator relative to the second stator to move each tiltable axle of the plurality of traction planets to a particular skew angle; and a timing plate having a plurality of helical grooves for further engagement with one of the first end or the second end of each tiltable axle of the plurality of traction planets.