Supermoto · 2014–present

Zero FX

Off-road supermoto

Gen 1· XMX · modular· 2014–present

106

137

km/h

7.2

kWh

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

Read the Zero FX owner's guide

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

Motor & performance

Motor: Z-Force 75-5 passively air-cooled, high efficiency magnet, brushless motor (radial flux interior permanent magnet)
Peak power: 33 kW / 44 CV
Peak torque: 106 Nm
Top speed: 137 km/h
Power-to-weight: 2.98 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: Regenerative deceleration via the high-efficiency 550 amp 3-phase brushless controller; dashboard REGEN meter shows torque/power fed back into the battery during braking. No adjustable regen levels described.

Range (Zero figures)

City: 164 km
Highway: 92 km
Combined: 104 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): 218 / 227 mm
Rake / trail: 25.4 ° / 104 mm
Wheelbase: 1438 mm

Brakes

Front: J-Juan asymmetric dual piston floating caliper, 240 mm OD x 4.5 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: spoked
Front wheel / tyre: 1.85 x 21 in / Pirelli Scorpion MT-90 A/T 90/90-21 54S
Rear wheel / tyre: 2.50 x 18 in / Pirelli Scorpion MT-90 A/T 120/80-18 62S
Front pressure (cold): 29 psi (200 kPa)
Rear pressure (cold): 31 psi (214 kPa)

Lighting

Headlight: H3 halogen 55W
Tail light: 1157 incandescent 5W (brake/tail)
Turn signals: RY10W amber incandescent 10W
Running light (DRL): Separate running light present (FX-only; 'Running Light Bulb Replacement - FX', bulb-replaceable); bulb type/wattage not specified

Dimensions & weight

Seat height: 881 mm
Curb weight: 131 kg

Battery packs

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

ZF2.82.8 kWh

Modular brick · 2013-2015

ZF3.33.3 kWh

Modular brick · 2016-2017

ZF3.63.6 kWh

Modular brick · 2019-2023

ZF5.75.7 kWh

Modular brick · 2013-2015

ZF6.56.5 kWh

Modular brick · 2016-2018

ZF6.5 (integrated)6.5 kWh

Monolith pack · 2016-2018

ZF7.27.2 kWh

Modular brick · 2018-2023

Fitted to the 2025 FX

Power Pack Module (FX brick)3.6 kWh

Modular brick · Add-on · 2013-2023

Real-world data

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

Components, MY2025

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	2014–2025	3 model lines
Front fork	Showa 41 mm inverted cartridge	2015–2025	7 model lines
Rear shock	Showa 40 mm piston piggy-back reservoir	2015–2025	9 model lines
Front brake	J-Juan 2-piston 240 x 4.5 mm disc	2015–2025	this line only
Rear brake	J-Juan 1-piston 240 x 4.5 mm disc	2014–2025	9 model lines
ABS / stability control	Bosch Gen 9	2015–2025	7 model lines
Final drive belt	Gates Poly Chain HTD Carbon	2017–2025	9 model lines
Front tyre	Pirelli Scorpion MT-90 A/T 90/90-21	2015–2025	this line only
Rear tyre	Pirelli Scorpion MT-90 A/T 120/80-18	2015–2025	this line only

No catalogue row names the Zero FX for MY2025 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: Poly Chain HTD Carbon belt (90T / 18T)
Brake fluid: DOT 4
Front tyre: Pirelli Scorpion MT-90 A/T 90/90-21 54S
Rear tyre: Pirelli Scorpion MT-90 A/T 120/80-18 62S
Headlight: H3 halogen 55W
Tail light: 1157 incandescent 5W (brake/tail)
Turn signals: RY10W amber incandescent 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 ride
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
Initial 100 mi (160 km) - first service / break-in
Check drive belt tension
Initial 600 mi (1,000 km) - second service
Check 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 months
Replace 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 B
Repack steering bearings with all-purpose grease
Every 24,000 mi (37,000 km) - Note A
Replace drive belt; check swingarm pivot bearings for smooth operation
As needed
Replace worn drive chain

Service timeline

Every occurrence of every interval, from Zero's 22MY_XMX_OM_-_English-05.pdf, page 77.

Break-in

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

160 km

first service / break-in

1k km

second service

Recurring

Every mark is one occurrence, to 40k km

Every 13k kmor 12 months — whichever first

Replace 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 25k km

Repack steering bearings with all-purpose grease

Every 37k km

Replace drive belt; check swingarm pivot bearings for smooth operation

08k16k24k32k40k

Every ride

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

As needed

Replace worn drive chain

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
2025	44	106	137	7.2	131	2.98	90T / 18T
2024	44	106	137	7.2	131	2.98	90T / 18T
2023	44	106	137	7.2	131	2.98	90T / 18T
2022	44	106	137	7.2	131	2.98	90T / 18T
2021	44	106	137	7.2	131	2.98	90T / 18T
2020	44	106	137	7.2	131	2.98	90T / 18T
2019	44	106	137	7.2	131	2.98	90T / 18T
2018	44	106	137	7.2	131	2.98	90T / 18T
2017	44	106	137	6.5	131	2.98	90T / 20T
2016	44	95	137	6.5	131	2.98	132T / 25T
2015	44	95	137	2.8	112	2.55	132T / 25T
2014	44	95	137	2.8	108	2.45	132T / 25T

Compare the 2025 FX 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.