Zero FXS
Street supermoto
Motor & performance
- Motor
- Z-Force 75-5 passively air-cooled, high-efficiency magnet, brushless motor
- Peak power
- 33 kW / 44 CV
- Peak torque
- 106 Nm
- Top speed
- 132 km/h
- Power-to-weight
- 3.02 kg/CV
Battery & charging
- Capacity (max)
- 7.2 kWh
- Capacity (nominal)
- 6.3 kWh
- Chemistry
- Z-Force Li-Ion Intelligent Modular
- Onboard charger
- 0.65 kW
- Charge time
- 9.7 hours (100% charged) / 9.2 hours (95% charged)
Drivetrain & belt
- Belt
- Poly Chain HTD Carbon belt
- Sprocket / pulley (corona/pignone)
- 90T / 18T
- Final drive ratio
- 90T/18T
- Belt part number
- — (see dealer parts catalog)
- Transmission
- Clutchless Direct Drive
- Regen braking
- Off-throttle regenerative deceleration: releasing the throttle begins regenerative braking, feeding energy back into the power pack; a slight drag is felt when active. To coast without regen, hold the throttle just off the fully closed position. Controller provides regenerative deceleration.
Range (Zero figures)
- Combined
- 106 km
Chassis & suspension
- Model generation
- XMX · modular (Gen 1)
- 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)
- 178 / 227 mm
- Rake / trail
- 24.4 ° / 71 mm
- Wheelbase
- 1422 mm
Brakes
- Front
- J-Juan asymmetric dual piston floating caliper, 320 mm OD x 5 mm thick disc
- Rear
- J-Juan single piston floating caliper, 240 mm OD x 4.5 mm thick disc
- ABS
- Bosch Gen 9
Wheels & tyres
- Wheel type
- cast
- Front wheel / tyre
- 3.00 x 17 in / Pirelli Diablo Rosso II 110/70-R17 M/C 54H
- Rear wheel / tyre
- 3.50 x 17 in / Pirelli Diablo Rosso II 140/70-R17 M/C 66H
- Front pressure (cold)
- 221 kPa (32 PSI)
- Rear pressure (cold)
- 234 kPa (34 PSI)
Lighting
- Headlight
- H3 halogen 55W
- Tail light
- 1157 incandescent 5W
- Turn signals
- RY10W amber 10W
- Running light (DRL)
- W3W 3W
Dimensions & weight
- Seat height
- 836 mm
- Curb weight
- 133 kg
Battery packs
The Z-Force packs offered on this bike across 2016–2021 — capacity, construction and weight on each pack's page.
Real-world data
Real-world figures for the Zero FXS — aggregated and anonymized from actual riding data, not brochure numbers.
Components, MY2021
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 75-5 | 2016–2021 | 3 model lines |
| Front fork | Showa 41 mm inverted cartridge | 2016–2021 | 7 model lines |
| Rear shock | Showa 40 mm piston piggy-back reservoir | 2016–2021 | 9 model lines |
| Front brake | J-Juan 2-piston 320 x 5 mm disc | 2016–2021 | 6 model lines |
| Rear brake | J-Juan 1-piston 240 x 4.5 mm disc | 2016–2021 | 9 model lines |
| ABS / stability control | Bosch Gen 9 | 2017–2021 | 7 model lines |
| Final drive belt | Gates Poly Chain HTD Carbon | 2017–2021 | 9 model lines |
| Front tyre | Pirelli Diablo Rosso II 110/70-R17 | 2016–2021 | 3 model lines |
| Rear tyre | Pirelli Diablo Rosso II 140/70-R17 | 2016–2021 | 3 model lines |
No catalogue row names the Zero FXS for MY2021 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.
Maintenance & parts
From the official Zero owner & service manuals.
Consumables & wear parts
- Drive belt
- Poly Chain HTD Carbon belt (90T / 18T)
- Brake fluid
- DOT 4
- Front tyre
- Pirelli Diablo Rosso II 110/70-R17 M/C 54H
- Rear tyre
- Pirelli Diablo Rosso II 140/70-R17 M/C 66H
- Headlight
- H3 halogen 55W
- Tail light
- 1157 incandescent 5W
- Turn signals
- RY10W amber 10W
Drive belt service
- Tension target
- Gates Carbon Drive, 11 mm belt pitch. Frequency method (Gates Carbon Drive smartphone app): 42.5 Hz to 73.6 Hz. Tension Tester tool: 25-76.5 kg (approx. 55-169 lb).
- Inspect / adjust
- Inspect belt for damage/cracking every ride; check belt tension at initial 100 mi (160 km), initial 600 mi (1,000 km), then every 8,000 mi (13,000 km) or 12 months.
- Replace
- Every 24,000 mi (37,000 km) (Note A), or sooner if damaged/ratcheting.
- First / break-in service
- Initial 100 mi (160 km): check drive belt tension (break-in); followed by a second early service at 600 mi / 1,000 km. Zero also recommends a dealer service every 12 months regardless of distance.
- Belt part number
- — (dealer parts catalog)
Key torque specs
- Rear axle end bolt
- 75 lb-ft (102 Nm), Loctite 242
- Rear axle nut (drive belt adjustment)
- 75 lb-ft (102 Nm), Loctite 242
- Belt tensioner / axle jam nuts
- 15 lb-ft (20 Nm)
- Front axle
- 40 lb-ft (54 Nm), anti-seize
- Main pivot bolt/nut (swingarm)
- 75 lb-ft (102 Nm), Loctite 242
- Front brake caliper mount bolts
- 19 lb-ft (26 Nm), Loctite 242
- Rear brake pad pin
- 6 lb-ft (8 Nm), Loctite 242
- Rear axle slider retaining bolts
- 15 lb-ft (26 Nm)
- Handlebar clamp mount bolts
- 18 lb-ft (24 Nm)
- Shock mount bolts (upper / lower)
- 52 lb-ft (70.5 Nm) / 38 lb-ft (51.5 Nm)
Service schedule
- Every rideCheck brake fluid level (front & rear); check front & rear brake operation, fluid leakage and pads; check tyres (tread depth, damage, air pressure); inspect drive belt for damage/cracking; check belt & chain sprockets; check drive-chain slack/alignment/condition (lubricate after exposure to water); check front fork and rear shock for operation/oil leakage; check throttle grip operation and free play
- Initial 100 mi (160 km) - first service / break-inCheck drive belt tension
- Initial 600 mi (1,000 km) - second serviceCheck drive belt tension; check wheel bearings; adjust and thoroughly lubricate drive chain; check steering bearings for looseness; apply grease and check front brake lever pivot shaft; check kickstand switch operation; drive motor commissioning and timing
- Every 8,000 mi (13,000 km) or 12 monthsReplace brake fluid (front & rear); check wheels for run-out/damage; check wheel bearings; check drive belt tension; check steering bearings for looseness; check and tighten all chassis fasteners; grease/check/service front brake lever pivot shaft; check throttle grip; check and grease kickstand pivots; check/replace kickstand switch; drive motor commissioning and timing
- Every 16,000 mi (25,000 km) - Note BRepack steering bearings with all-purpose grease
- Every 24,000 mi (37,000 km) - Note AReplace drive belt; check swingarm pivot bearings for smooth operation
- As neededReplace worn drive chain
Service timeline
Every occurrence of every interval, from Zero's 21MY_XMX_OM_-_English-05.pdf, page 77.
Break-in
Own scale — these all happen in the first 1k kmRecurring
Every mark is one occurrence, to 40k kmReplace brake fluid (front & rear); check wheels for run-out/damage; check wheel bearings; check drive belt tension; check steering bearings for looseness; check and tighten all chassis fasteners; grease/check/service front brake lever pivot shaft; check throttle grip; check and grease kickstand pivots; check/replace kickstand switch; drive motor commissioning and timing
Repack steering bearings with all-purpose grease
Replace drive belt; check swingarm pivot bearings for smooth operation
Check brake fluid level (front & rear); check front & rear brake operation, fluid leakage and pads; check tyres (tread depth, damage, air pressure); inspect drive belt for damage/cracking; check belt & chain sprockets; check drive-chain slack/alignment/condition (lubricate after exposure to water); check front fork and rear shock for operation/oil leakage; check throttle grip operation and free play
Replace worn drive chain
Model year evolution
Pick a year to put it head to head with another bike — charging, range and what a replacement battery costs.
Specifications extracted from the official Zero Motorcycles owner & service manuals (EU / metric figures). Values are for guidance — always confirm against your bike's manual.