Street · 2014–2023Discontinued

Zero S · Gen 2

Naked street commuter

Gen 2· SDS · Z-Force (Cypher II)· 2014–2023

109

139

km/h

14.4

kWh

3.14 kg/CVpower-to-weight (latest year)

Read the Zero S owner's guide

Charging, ride modes, maintenance, warning lights & care — everything from the manual, in plain language.

The Zero S spans more than one generation — a different platform, frame, suspension and drivetrain. You're viewing Gen 2 (2014–2023). Other generations:

Gen 3· FST · Cypher III· 2024–present

Motor & performance

Motor: Z-Force 75-7 passively air-cooled, high-efficiency magnet, brushless motor; radial flux interior permanent; High efficiency, 550 amp, 3-phase brushless controller with regenerative deceleration
Peak power: 44 kW / 59 CV
Peak torque: 109 Nm
Top speed: 139 km/h
Power-to-weight: 3.14 kg/CV

Battery & charging

Capacity (max): 14.4 kWh
Capacity (nominal): 12.6 kWh
Chemistry: Lithium-Ion (Z-Force Li-Ion Intelligent Power Pack)
Onboard charger: 1.3 kW
Charge time: 9.8 hours (100% charged) / 9.3 hours (95% charged)

Drivetrain & belt

Belt: Gates Carbon Drive, Poly Chain HTD Carbon belt
Sprocket / pulley (corona/pignone): 90T / 20T
Final drive ratio: 90T/20T
Belt part number: — (see dealer parts catalog)
Transmission: Clutchless Direct Drive
Regen braking: Off-throttle regenerative braking (controller regenerative deceleration); engages when throttle is fully closed, felt as a slight drag; hold throttle just off closed to coast without regen

Range (Zero figures)

Combined: 200 km

Chassis & suspension

Model generation: SDS · Z-Force (Cypher II) (Gen 2)
Front fork: Showa 41 mm inverted cartridge forks, with adjustable spring preload, compression, and rebound damping
Rear shock (mono): Showa 40 mm piston, piggy-back reservoir shock with adjustable spring preload, compression, and rebound damping
Suspension travel (f/r): 159 / 161 mm
Rake / trail: 24 ° / 80 mm
Wheelbase: 1410 mm

Brakes

Front: Bosch Gen 9 ABS, J-Juan asymmetric dual piston floating caliper, 320 mm OD x 5 mm thick disc
Rear: Bosch Gen 9 ABS, J-Juan single piston floating caliper, 240 mm OD x 4.5 mm thick disc
ABS: Bosch Gen 9 ABS

Wheels & tyres

Wheel type: cast
Front wheel / tyre: 3.00 x 17 / Pirelli Diablo Rosso II 110/70-17
Rear wheel / tyre: 3.50 x 17 / Pirelli Diablo Rosso II 140/70-17
Front pressure (cold): 32 PSI (221 kPa)
Rear pressure (cold): 34 PSI (234 kPa)

Lighting

Headlight: H4 halogen, 55/60W
Tail light: LED (combined brake/tail)
Turn signals: Replaceable bulb (Turn Signal Light Bulb, non-LED)

Dimensions & weight

Seat height: 807 mm
Curb weight: 185 kg

Battery packs

The Z-Force packs offered on this bike across 2014–2023 — capacity, construction and weight on each pack's page.

ZF7.27.2 kWh

Modular brick · 2018-2023

ZF8.58.5 kWh

Monolith pack · 2013-2014

ZF9.49.4 kWh

Monolith pack · 2015

ZF9.89.8 kWh

Monolith pack · 2016

ZF11.411.4 kWh

Monolith pack · 2013-2014

ZF12.512.5 kWh

Monolith pack · 2015

ZF13.013 kWh

Monolith pack · 2016-2017

ZF14.414.4 kWh

Monolith pack · 2018-2021

Fitted to the 2023 S

Power Tank (2.8 kWh)2.8 kWh

Power Tank · Add-on · 2014-2017

Power Tank ZF3.63.6 kWh

Power Tank · Add-on · 2018-2025

Real-world data

Real-world figures for the Zero S — aggregated and anonymized from actual riding data, not brochure numbers.

Components, MY2023

What Zero’s own manual specifies for this exact model year, and how widely each part was shared across the range. Every row names the manual behind it.

Part	As the manual describes it	On this model	Shared with
Motor	Z-Force 75-7	2014–2026	3 model lines
Motor controller	3-phase brushless controller, 550 Athe manual gives the dimension and names no maker	2020–2023	4 model lines
Front fork	Showa 41 mm inverted cartridge	2015–2023	7 model lines
Rear shock	Showa 40 mm piston piggy-back reservoir	2015–2026	9 model lines
Front brake	J-Juan 2-piston 320 x 5 mm disc	2015–2023	6 model lines
Rear brake	J-Juan 1-piston 240 x 4.5 mm disc	2014–2026	9 model lines
ABS / stability control	Bosch Gen 9	2015–2023	7 model lines
Final drive belt	Gates Poly Chain HTD Carbon	2019–2026	9 model lines
Front tyre	Pirelli Diablo Rosso II 110/70-17	2017–2023	2 model lines
Rear tyre	Pirelli Diablo Rosso II 140/70-17	2017–2023	2 model lines

Your manual gives one wear limit you can measure yourself: replace the brake pads at 0.053 in (1.35 mm) or less (p.84).

No catalogue row names the Zero S for MY2023 directly. Parts fitted to it may still be listed under a platform token, which this page will not expand for you — browse the part index instead.

How this compares across the range Part numbers Exploded diagrams for this year

Maintenance & parts

From the official Zero owner & service manuals.

Consumables & wear parts

Drive belt: Gates Carbon Drive, Poly Chain HTD Carbon belt (90T / 20T)
Brake fluid: DOT 4
Front tyre: Pirelli Diablo Rosso II 110/70-17
Rear tyre: Pirelli Diablo Rosso II 140/70-17
Headlight: H4 halogen, 55/60W
Tail light: LED (combined brake/tail)
Turn signals: Replaceable bulb (Turn Signal Light Bulb, non-LED)

Drive belt service

Tension target: MY2014–2023 (SDS platform): 42.5–73.6 Hz — Gates Carbon Drive, 11 mm pitch, Tension Tester 25–76.5 kg. MY2024 onwards (FST platform): 62–82 Hz.
Inspect / adjust: Every 8,000 mi (13,000 km) or 12 months
Replace: Every 24,000 mi (37,000 km)
First / break-in service: Initial 100 mi (160 km)
Belt part number: — (dealer parts catalog)

Key torque specs

Rear axle nut: 75 lb·ft (102 Nm)
Belt tension adjustment bolts: 4 lb-ft (5 Nm)
Power pack to frame bolts (left/right side): 26 lb-ft (35 Nm)
Brake hose banjo bolt: 20 lb-ft (27 Nm)
Power pack ground strap bolt: 5 lb-ft (7 Nm)

Service schedule

Initial 100 mi (160 km)
drive belt tension, front brake lever pivot, throttle grip, kickstand pivots/switch, drive motor commissioning
Initial 600 mi (1,000 km)
wheel bearings, drive belt tension, steering bearings, front brake lever pivot, kickstand switch, drive motor commissioning
Every 8,000 mi (13,000 km) or 12 months
replace brake fluid, wheels run-out, wheel bearings, drive belt tension, steering bearings, chassis fasteners
Every 16,000 mi (25,000 km)
repack steering bearings with grease
Every 24,000 mi (37,000 km)
replace drive belt, swingarm pivot bearings

Service timeline

Every occurrence of every interval, from Zero's S_SR-SRF_Service_Manual_8811935-AJ.pdf, page 13.

Break-in

Own scale — these all happen in the first 1k km

160 km

drive belt tension, front brake lever pivot, throttle grip, kickstand pivots/switch, drive motor commissioning

1k km

wheel bearings, drive belt tension, steering bearings, front brake lever pivot, kickstand switch, drive motor commissioning

Recurring

Every mark is one occurrence, to 40k km

Every 13k kmor 12 months — whichever first

replace brake fluid, wheels run-out, wheel bearings, drive belt tension, steering bearings, chassis fasteners

Every 25k km

repack steering bearings with grease

Every 37k km

replace drive belt, swingarm pivot bearings

08k16k24k32k40k

Every model's schedule What that noise means Drive belt tension & alignment Every torque by model year

Model year evolution

Pick a year to put it head to head with another bike — charging, range and what a replacement battery costs.

Year	CV	Nm	km/h	kWh	kg	kg/CV	Belt
2023	59	109	139	14.4	185	3.14	90T / 20T
2022	59	109	139	14.4	185	3.14	90T / 20T
2021	59	109	139	14.4	185	3.14	90T / 20T
2020	60	110	153	14.4	185	3.08	90T / 20T
2019	60	110	153	14.4	185	3.08	90T / 20T
2018	60	110	153	14.4	185	3.08	90T / 20T
2017	60	110	158	13	185	3.08	130T / 28T
2016	54	92	153	13	185	3.43	130T / 28T
2015	54	92	158	12.5	185	3.43	132T / 28T
2014	54	92	153	11.4	181	3.35	132T / 28T

Compare the 2023 S with another bike Table of every model Back to catalog

Specifications extracted from the official Zero Motorcycles owner & service manuals (EU / metric figures). Values are for guidance — always confirm against your bike's manual.