Zero XB — complete owner's guide

The Zero XB is a compact electric motorcycle powered by a mid-mounted permanent-magnet synchronous (PMSM) motor rated at 4 kW continuous. It delivers 31 lb-ft (42 Nm) of peak motor torque, which the variable gear reduction multiplies to roughly 275 lb-ft (373 Nm) at the rear wheel for strong low-speed pull. Top speed is an estimated 28 mph (45 km/h), consistent with its EU L1e-B light-moped classification, and it is designed to carry a single rider only.

The heart of the bike is a removable 74 V / 32 Ah lithium battery with a usable capacity of about 2.4 kWh, giving a claimed range of 47 mi (75 km) at a steady 31 mph (50 km/h). Real-world range varies with riding style, terrain, load, temperature and tyre pressure. The XB is deliberately light and narrow, making it easy to handle on trails and around town, and its drivetrain combines an internal gear reduction with a belt and a final drive chain.

Because it is a genuine high-voltage electric vehicle, none of the powertrain (battery, motor, controller or high-voltage wiring) should ever be opened or modified by the owner; those repairs are reserved for Zero-trained technicians.

The XB uses two handlebar switch clusters plus a set of dash buttons. The left cluster carries the headlight high/low switch, the turn-signal switch (which must be cancelled manually by returning it to centre), the horn, a flash-to-pass button, and the reverse button. The right cluster holds the kill switch (up disables the motor, down energises it for travel), the cruise-control button and the MODE button that cycles ride modes. Below the screen sit the MENU, TCS (traction control), hazard, Park (P) and SET buttons. A separate two-position key switch (Off/On) sits in front of the seat, and there is an independent handlebar steering lock for security.

The display shows state of charge, a clock, the active ride mode (or PARK), a READY indicator, motor speed, road speed and both an odometer and a resettable trip odometer. The speedometer only appears once the kickstand is up and the kill switch is in the down (run) position — in other words, only when the bike is actually ready to move. A row of tell-tale icons covers turn signals, kill switch, kickstand, tip-over, the malfunction indicator, a temperature warning, traction control, cruise control, high beam and charging.

All display settings live behind the MENU button: short-press MENU to enter, short-press SET to move between items, and long-press SET to open a screen. From here you can adjust the RIDE settings, switch between light and dark THEME, set one of five BRIGHTNESS levels, toggle UNITS between miles and kilometres, change LANGUAGE, view active FAULTS, set the TIME (12 or 24 hour), check the SYSTEM firmware version, or RESET the display to factory defaults.

The XB offers three ride modes selected with the MODE button on the right switch cluster, with STANDARD as the default. ECO softens power and acceleration and is ideal for new riders; STANDARD gives moderate, everyday power once you are comfortable with the bike; and SPORT delivers the strongest response, intended for confident riders and unpaved surfaces such as forest trails. You can change modes while moving as long as the throttle is fully released; the motor must be on, the kill switch in run and the throttle closed.

The throttle is a twist grip — rotate it counter-clockwise to drive the motor forward, and release it to let it snap closed and cut power. Regenerative braking is adjustable through three levels in the RIDE menu: level 1 is the gentlest and level 3 the strongest. At the highest setting the bike slows noticeably more when you close the throttle, recovering energy as it decelerates, which is useful on long descents. The RIDE menu also contains Tip Over Assist (cuts throttle if the bike falls) and Uphill Assist (holds the bike against rolling on inclines).

Two riding aids round out the system: cruise control, activated with the right-cluster button to hold a steady speed without holding the throttle, and traction control (TCS), toggled with the TCS button to limit rear-wheel slip under acceleration. Cruise control cancels automatically when you brake, change ride mode, use the kill switch, or press the button again. The TCS tell-tale illuminates whenever traction control is switched off, unavailable, or actively intervening.

The XB carries a removable 74 V / 32 Ah lithium battery (2.4 kWh) that can be charged either in the bike or lifted out. Using the supplied 800 W off-board charger, a full charge takes approximately 3 hours from a standard 110 V or 220 V AC outlet. Zero recommends a circuit that can supply at least 840 W. Always use the charger supplied with the bike or an approved Zero replacement — non-approved chargers can damage the battery or cause a fire, and using an unapproved charger voids the warranty.

Temperature governs both charging and performance. The battery's best operating window is 50–86°F (10–30°C), with an allowable range of 5–113°F (−15 to 45°C). The battery-management system will not charge above an internal 113°F (45°C) or at or below 32°F (0°C); after a hard ride it may delay charging until the pack cools, and if it is too cold it must be allowed to warm naturally — never heat or cool it artificially. Charging should always happen in a dry, ventilated space away from flammable materials, never in the rain.

Battery longevity depends on how you store it. For long idle periods keep the charge between 40% and 60% at 68–77°F (20–25°C), top it up to that band once a month, and once a year run a full 100% charge followed by a discharge below 10% before returning to the 40–60% routine. Avoid deep discharges and, importantly, never leave the battery below 30% state of charge for more than 30 days — doing so can cause permanent damage that is not covered by warranty. A tip-over lockout also applies: the bike cannot be charged (or driven) while it is on its side.

Before your first rides, and ideally before every ride, run through a quick pre-ride inspection. Confirm the headlight and signals work, the handlebars turn freely without play, the throttle snaps back to closed on its own, the tyres are undamaged and correctly inflated, the brakes feel firm, the drive chain tension is correct, the kickstand cut-off works, and the suspension moves smoothly without oil leaks. Check that the battery has enough charge for your intended ride.

Starting the XB follows a set sequence, and the bike deliberately refuses to move until the safety interlocks are satisfied — the kickstand must be up and the kill switch in run before the speedometer even appears. To stop, close the throttle, disable the motor with the kill switch, lower the kickstand, and turn the key off, removing it to deter theft. Brake with both levers together (right lever for the front, left lever for the rear) and release the throttle as you brake; on long descents brake intermittently rather than dragging the brakes, which can overheat them.

The break-in phase is anchored by the initial service at 60 mi (100 km), which should not be skipped — it catches fasteners and drive components that settle during early use. During the break-in and warranty period, Zero recommends returning to the dealer at the scheduled intervals for inspection and adjustment. If the bike is ever tipped over, the tip-over sensor disables drive; stand it upright and perform one full key cycle (key off, wait for the screen to go blank, then key on) to reset it.

The XB uses a mileage- and time-based service schedule; when both a distance and a time are given, follow whichever comes first. At every ride you should check tyre pressure and tread, brake operation, brake-fluid level, the battery for damage, the lights and signals, and the wheels and spokes. The drive chain gets its first tension check and adjustment at the initial 60 mi (100 km) service, then every 300 mi (500 km) thereafter, and it should be lubricated every 300 mi (500 km) — or sooner after riding in rain or dirt.

At every 1,250 mi (2,000 km) the schedule adds a full hardware-torque check, a drive-belt inspection and tension check, sprocket wear inspection, a wiring-harness check, a tip-over-protection test, and inspection of the wheel, steering, suspension-linkage and swingarm bearings. The drive chain is replaced at 3,100 mi (5,000 km), and at 6,200 mi (10,000 km) or 12 months the brake fluid is replaced and the front suspension is serviced or replaced as needed.

The drive belt is checked with a Gates ultrasonic tension meter (settings: mass 5.0 g/m, width 20 mm, span 122 mm), targeting 550 ± 50 N, verified at four wheel positions 90° apart. The final-drive chain should have 10–15 mm of sag; clean it with kerosene (never soaking longer than 10 minutes) and lubricate it with ISO grade 32 or 46 oil, letting it penetrate for about 30 minutes before riding. Keep all chain cleaner and lubricant well away from the brake rotors and pads. When the chain wears out, replace it together with both sprockets.

Both tyres run 29 psi (200 kPa) cold, front and rear, and the pressure must never exceed 32 psi (225 kPa). Check pressures with an accurate gauge when the tyres are cold — ideally after the bike has sat unridden for at least three hours — and refit the valve caps afterwards. The XB rolls on 19-inch wheels with 70/100-19 tyres at each end; spokes should be checked for tightness and torqued to 29 ± 7 lb-in (3.25 ± 0.75 Nm). If a spoke breaks, replace the adjacent spokes as well, and lower the tyre pressure when fitting off-road tyres for trail use.

The XB has hydraulic disc brakes — a 220 mm front rotor and a 203 mm rear rotor — using DOT 4 brake fluid. Keep the fluid above the lower third of each sight glass and top up with fresh fluid from a sealed container only; never ride with the level below that mark. Replace the friction pads when they wear below 2.5 mm and the rotors when they drop below 2.0 mm. A spongy lever, unusually long lever travel or noticeable fluid loss means you should stop and have the system inspected before riding again.

Suspension is adjustable at both ends. The front forks offer preload adjustment on the left leg and rebound damping on the right, plus an air chamber that should be set to about 110 ± 10 psi (758 ± 69 kPa) and checked every three months with a shock pump. The rear shock provides preload, compression and rebound adjustment — set preload to match your weight so the bike sits correctly under load, then fine-tune compression and rebound so it neither bottoms out harshly nor packs up over consecutive bumps. Clean and lightly grease the fork and shock tubes after each ride, but never aim pressurised water at the dust seals.

If the XB will sit unused for more than 30 days, prepare it for storage: clean it thoroughly, set the battery to roughly 40–60% charge, and turn off the key switch. Store it somewhere dry, clean, ventilated and shielded from rain and direct sun, away from flammable or corrosive materials, and not in an overheated or humid space. Set the tyres to their correct pressure and, ideally, raise both wheels off the ground on stands so the tyres are not loaded on one spot for weeks.

The battery drives your storage routine. Keep it in the 40–60% band at 68–77°F (20–25°C), and top it up once a month to stay in that range; run one full charge to 100% each year followed by a discharge below 10% before returning to the monthly routine. Critically, never let the battery drop below 30% state of charge for more than 30 days, as this can cause permanent, warranty-voiding damage. When you bring the bike back into service, fully charge the battery first to restore it to peak condition.

Cold weather calls for extra care. Do not charge the battery below 32°F (0°C) — if it is too cold to charge, let it warm naturally rather than using any heating device. Performance and range drop in low temperatures but recover automatically as the pack returns to its normal operating range. Keep the battery upright at all times, and if the bike is left standing over winter, the monthly top-up to 40–60% prevents damage from long-term self-discharge.

The malfunction indicator on the dash lights whenever an active fault is present, and stored diagnostic codes can be read through the FAULTS screen in the dash menu (MENU, then SET to reach FAULTS, then open it). The temperature indicator lights when the battery, motor or controller approaches or exceeds its normal temperature limit, which may temporarily restrict power or charging — and it is normal for the malfunction indicator to light at the same time as the temperature warning.

Fault codes fall into three families. Codes beginning with 'b' relate to the battery and its management system (for example cell-pressure, over/under-temperature, over-current and insulation faults); many simply ask you to charge the battery, reduce charging current, or wait for the temperature to normalise, while others direct you to a Zero dealer. Codes beginning with 'C' are charger faults, often resolved by checking the input voltage or cycling the bike off and on. Codes beginning with 'P' cover the controller and motor — over-temperature, over/under-voltage, throttle, motor-lock and communication faults — some of which reset with a power cycle and others of which need dealer attention.

For common no-fault symptoms, work through the basics first. If there is no power with the key on, check that the battery connector is fully seated, the battery is charged and within its temperature range, and the main fuse is intact. If the bike powers up but won't move, confirm the kickstand is retracted, the kill switch is in run, the throttle is closed, and that no tip-over event is active (reset with a full key cycle). Reduced power usually points to a low or temperature-limited battery, or a hot motor or controller that needs to cool.

The Zero XB is homologated in Europe as an L1e-B light moped, capped at 28 mph (45 km/h). Riders must hold the appropriate moped or motorcycle licence for their country and obey all local traffic laws; the bike is intended for a single rider with a maximum payload of 220 lb (100 kg) and a gross vehicle weight of 359 lb (163 kg). Always wear a helmet and proper protective gear, ride with both hands on the bars and feet on the pegs, and remember that a near-silent electric bike may need the horn to alert pedestrians and other road users.

The powertrain is a genuine 74-volt high-voltage system. Never disassemble or modify the battery, motor, controller or their wiring — high-voltage cabling can remain energised for up to 60 seconds after shutdown, and tampering risks electric shock or fire. Any modification to controller firmware or settings is strictly prohibited: it can compromise safety and compliance and voids the warranty. If the battery ever smells odd, smokes or gets unusually hot, stop, disconnect power, move it away from flammable materials outdoors, and contact your dealer — use a Class D extinguisher and the fire service if it ignites.

The 2026 Zero XB carries a two-year limited warranty from the in-service date covering the motorcycle and battery against defects in materials and workmanship. The battery is covered specifically if it loses more than 20% of its published nominal capacity, as measured by an authorised dealer. Normal wear items — tyres, brake pads and rotors, the drive belt, fork seals, grips, foot pegs and the seat — are excluded, as is damage from misuse, unapproved chargers or accessories, racing, aggressive off-road abuse, and improper storage such as leaving the battery below 30% charge for over 30 days. Keeping the firmware updated at each service interval is a condition of coverage.