Street · 2014–2023Discontinued

Zero SR · Gen 2

Naked street performance

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

166

167

km/h

15.6

kWh

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

Read the Zero SR owner's guide

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

The Zero SR 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 75-10 enhanced thermal efficiency, passively air-cooled, interior permanent magnet AC motor
Peak power: 55 kW / 74 CV
Peak torque: 166 Nm
Top speed: 167 km/h
Power-to-weight: 3 kg/CV

Battery & charging

Capacity (max): 15.6 kWh
Capacity (nominal): 13.7 kWh
Chemistry: Z-Force Li-Ion Intelligent Power Pack
Onboard charger: 3 kW
Charge time: 4.4 hours (100% charged) / 3.9 hours (95% charged)

Drivetrain & belt

Belt: 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: activates when the throttle is fully closed while the motorcycle is in motion, returning energy to the power pack; 900 amp 3-phase AC controller with regenerative deceleration; Regen/Torque meter displays regen level

Range (Zero figures)

Combined: 164 km

Chassis & suspension

Platform / generation: SDS · Z-Force (Cypher II) (Gen 2)
Front fork: Showa 43 mm big piston, separate function 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): 120 / 140 mm
Rake / trail: 24.5 ° / 94 mm
Wheelbase: 1450 mm

Brakes

Front: Dual J-Juan radial-mounted 4-piston calipers, 320 x 5 mm disc
Rear: J-Juan single piston floating caliper, 240 x 4.5 mm disc
ABS: Bosch Base MSC (ABS with motorcycle stability control)

Wheels & tyres

Wheel type: cast
Front wheel / tyre: 3.50 x17 / Pirelli Diablo Rosso III 120/70-17
Rear wheel / tyre: 5.50 x17 / Pirelli Diablo Rosso III 180/55-17
Front pressure (cold): 36 psi (248 kPa)
Rear pressure (cold): 36 psi (248 kPa)

Lighting

Headlight: LED
Tail light: LED (combined brake/tail)
Turn signals: RY10W (10W) incandescent, amber

Dimensions & weight

Seat height: 787 mm
Curb weight: 222 kg

Real-world data

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

Maintenance & parts

From the official Zero owner & service manuals.

Consumables & wear parts

Drive belt: Poly Chain HTD Carbon belt (90T / 20T)
Brake fluid: DOT 4
Front tyre: Pirelli Diablo Rosso III 120/70-17
Rear tyre: Pirelli Diablo Rosso III 180/55-17
Headlight: LED
Tail light: LED (combined brake/tail)
Turn signals: RY10W (10W) incandescent, amber

Drive belt service

Tension target: 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

Model year evolution

Year	CV	Nm	km/h	kWh	kg	kg/CV	Belt
2023	74	166	167	15.6	222	3	90T / 20T
2022	74	166	167	14.4	222	3	90T / 20T
2021	69	146	163	14.4	188	2.72	90T / 20T
2020	69	146	163	14.4	188	2.72	90T / 20T
2019	69	146	164	14.4	188	2.72	90T / 20T
2018	69	146	164	14.4	188	2.72	90T / 20T
2017	69	146	164	13	188	2.72	90T / 20T
2016	67	144	164	13	188	2.81	130T / 30T
2015	67	144	164	13.6	188	2.81	132T / 30T
2014	67	144	164	14.2	205	3.06	132T / 30T

Compare with other models 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.