The Zero S is an entry-level electric motorcycle designed for street riding. The SR is another road-specific electric sibling that is claimed to offer the longest range of the Zero lineup (claimed 112 highway miles). The S comes with the ZF7.2 battery and the SR is equipped with the ZF14.4. Electric machines drop down some substantial torque and such is the case with the SR’s Z-Force motor that produces up to a claimed 116 pound-feet. Another added benefit of going electric? Limited maintenance (no chain replacement, no oil changes, no spark plugs, etc.). Going electric can be pretty easy with these models.