Z-Force Motor/Splined Shaft Update
From Unofficial Zero Manual
In 2017, the Sevcon controllers were updated ("4.5" is the unofficial revision) to support more current to the motor.
- The Drive Belt was also reinforced and widened to apply more torque through the transmission and be more robust against interference.
- Accordingly, the motor shaft is now splined instead of keyed so the motors and sprockets are not compatible across the 2016-2017 year-line.
