2021 Zero SR-S

The first model year to include the Agni Motor, at which time the DS, a dual-sport model based on the S chassis became available. The XU, a smaller street bike with a removable battery, based on the same chassis as the Zero dirtbikes was produced

Zero introduced the ZF9 Power Pack with the Zero S & DS models making them the first production electric motorcycles that can exceed an EPA-estimated 100 miles on a single charge.

The Zero S and DS were completely redesigned. The battery capacity was increased to 11.4 kWh, and a new brushless permanent magnet AC motor was introduced. The Zero FX dual-sport model with modular removable power packs was introduced. CHAdeMO fast charging was also available on 2013 models.

The optional 2.8 kWh "Power Tank" became available. 2014 also saw the addition of the Zero SR to the range, a higher performance version of the Zero S, incorporating more powerful controller electrics and a motor with higher temperature magnets.

Were standard ABS brakes and Showa suspension. CHAdeMO fast charging was eliminated as an option, leaving instead an optional quick charger accessory at added cost.

Zero announced the DSR and FXS models. The DSR is based on the DS, but with the more powerful motor from the SR.

All models have the interior-permanent-magnet (IPM) motor. All models also received a larger capacity controller which provides an increase in maximum torque and horsepower output, up to 116 lbs/ft on the SR and DSR models. Include a locking tank box and more durable paint on S/DS/SR/DSR models, and the ability for owners to update their bike's firmware through the mobile app.

Zero introduced the ZF14.4 battery, available for the S and D models (alongside the ZF7.2 battery) and the SR and DSR models (where it is the only available option). Until the introduction of the 2020 SR/F, traction control was absent across the lineup.

New trellis-framed motorcycles were introduced, the SR/f and the faired SR/s, with higher performance, as well as 6 kW and 12 kW onboard charging options. Zero Motorcycles also produces a line of electric motorcycles for police, authority, and military use.

ZERO Motorcycles entered into the Australian market distributed through Peter Stevens Motorcycles, but in September 2025 failed to break into the EV market and liquidated its assets through Pickles Auctions.