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Zero SR
Street · 2014–2023Discontinued

Zero SR · Gen 2

Naked street performance

Gen 2· SDS · Z-Force (Cypher II)· 2014–2023
74
CV
166
Nm
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, each with 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
These are Zero's own figures at their own test speeds. What you get depends on how fast you ride, what you carry, the weather and the hills. Work it out for this bike.

Chassis & suspension

Model generation
SDS · Z-Force (Cypher II) (Gen 2)
Zero's platform generation for the machine itself, a different axis from the log-format generation our parser reports. The two do not always match: a bike's diagnostic files can decode as a different generation than its platform number.
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
3.50 x17
Rear wheel
5.50 x17
Original tyres, from Zero’s owner manual

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

Battery packs

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

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

ZF15.615.6 kWh

Monolith pack · 2022-2025

Fitted to the 2023 SR

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 SR, aggregated and anonymized from actual riding data rather than 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.

PartAs the manual describes itOn this modelShared with
MotorZ-Force 75-102022–20253 model lines
Front forkShowa 43 mm big-piston separate-function2022–20254 model lines
Rear shockShowa 40 mm piston piggy-back reservoir2015–20259 model lines
Front brakeJ-Juan 4-piston radial-mounted (twin caliper) 320 x 5 mm disc2022–20257 model lines
Rear brakeJ-Juan 1-piston 240 x 4.5 mm disc2015–20259 model lines
ABS / stability controlBosch Base MSC2022–20254 model lines
Final drive beltGates Poly Chain HTD Carbon2017–20259 model lines
Front tyrePirelli Diablo Rosso III 120/70-172022–20254 model lines
Rear tyrePirelli Diablo Rosso III 180/55-172022–20254 model lines

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

How this compares across the rangePart numbersExploded diagrams for this year

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
MY2014–2021 (SDS platform): 42.5–73.6 Hz — Gates Carbon Drive, 11 mm pitch, Tension Tester 25–76.5 kg. MY2022 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

  1. Initial 100 mi (160 km)
    drive belt tension, front brake lever pivot, throttle grip, kickstand pivots/switch, drive motor commissioning
  2. Initial 600 mi (1,000 km)
    wheel bearings, drive belt tension, steering bearings, front brake lever pivot, kickstand switch, drive motor commissioning
  3. 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
  4. Every 16,000 mi (25,000 km)
    repack steering bearings with grease
  5. 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 on charging, range and what a replacement battery costs.

YearCVNmkm/hkWhkgkg/CVBelt
20237416616715.6222390T / 20T
20227416616714.4222390T / 20T
20216914616314.41882.7290T / 20T
20206914616314.41882.7290T / 20T
20196914616414.41882.7290T / 20T
20186914616414.41882.7290T / 20T
201769146164131882.7290T / 20T
201667144164131882.81130T / 30T
20156714416413.61882.81132T / 30T
20146714416414.22053.06132T / 30T
Compare the 2023 SR 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.